{
  "url": "https://openlegislation.uk/restrictive-trade-practices-standards-and-arrangements-order-1990/schedule/part-I",
  "json_url": "https://openlegislation.uk/restrictive-trade-practices-standards-and-arrangements-order-1990/schedule/part-I.json",
  "legislation": "uksi/1990/888",
  "legislation_title": "The Restrictive Trade Practices (Standards and Arrangements) Order 1990",
  "legislation_url": "https://openlegislation.uk/restrictive-trade-practices-standards-and-arrangements-order-1990",
  "path": "schedule/part/I",
  "kind": "part",
  "number": "I",
  "heading": "STANDARDS APPROVED",
  "text": "06-1\nSafety belts, harnesses and associated equipment\nIssue 2, 1984\n09-1\nLead sleeves for electric cables (metric units)\nIssue 1, 1970\n09-2\nThe installation of 33kV and higher voltage power cables and associated auxiliary cables\nIssue 3, 1983\n09-3\n33kV impregnated paper insulated oil-filled and gas pressure type power cable systems\nIssue 2, 1982\n09-4\n66kV and 132kV impregnated paper insulated, oil-filled and gas pressure type power cable systems\nIssue 2, 1981\n09-5\n275kV and 400kV impregnated paper insulated, oil-filled and gas compression type power cable systems\nIssue 2, 1981\n09-6\nAuxiliary multicore and multipair cables\nIssue 6, 1988\n09-7\nPVC insulated concentric service cables with stranded copper or solid aluminium phase conductors and copper concentric conductors\nIssue 4, 1981\n09-8\nImpregnated paper insulated 600/1000 volt cable with three solid aluminium phase conductors and aluminium sheath/neutral conductor (Consac)\nIssue 4, 1977\n09-9\nPolymeric insulated, combined neutral/earth (CNE) cables with solid aluminium phase conductors and concentric aluminium wire waveform neutral/earth conductor\nIssue 5, 1981\n09-10\nPorcelain insulators for 33kV, 66kV 132kV, 275kV and 400kV pressure-assisted cable outdoor sealing ends\nIssue 1, 1976\n09-11\nHeat shrinkable insulating materials for use with 600/1000V cables and accessories\nIssue 1, 1975\n09-12\nImpregnated paper insulated corrugated aluminium sheathed 6350/11,000 volt cable\nIssue 1, 1979\n09-13\nPerformance specification for high voltage heat shrinkable components for use with high voltage solid type cables up to and including 33,000 volts\nIssue 1, 1981\n09-15\nJointing instructions and procedures for mass impregnated and mass impregnated non-draining paper insultated 19/33kV cables\nPart 1: Jointing instructions\nIssue 2, 1989\nPart 2: Jointing procedures\nIssue 2, 1989\n09-16\nTesting specification for metallic sheathed power cables with extruded cross-linked polyethylene insulation and accessories for system voltages of 66kV and 132kV\nIssue 1, 1983\n09-17\nSingle core cables for use in substations having extruded insulation and a rated voltage of 6350/11,000 volts\nIssue 1, 1984\nCorrigendum 1, 1987\n09-19\nSynthetic hydrocarbon insulating oil for use in oil-filled pressure-assisted cables up to 132kV operating voltage\nIssue 1, 1986\n09-20\n33kV Single Core hv polymeric insulated cable\nIssue 1, 1990\n12-3\nOutdoor meter cupboards\nIssue 2, 1986\n12-4\nTerminating equipment for pilot cables subject to induced transient voltages exceeding 650V rms\nIssue 1, 1973\n12-5\nIndicating lamps-filament type\nIssue 1, 1972\n12-6\nTime fuse-links\nIssue 1, 1973\n12-8\nThe application of fuse-links to 11kV/415V and 6.6kV/415V underground distribution networks\nIssue 2, 1986\n12-9\nWiping glands for metallic-sheathed cables\nIssue 2, 1980\n12-10\nSingle phase domestic cut outs up to 100A rating\nIssue 1, 1977\n12-11\nIndoor and outdoor cable boxes for switchgear\nIssue 2, 1981\n12-12\nCompounds for use in 33kV solid type cable accessories\nIssue 1, 1977\n12-14\nImpregnated crepe paper for cable jointing in solid type cable accessories\nIssue 1, 1976\n12-15\nWeak-back ferrules for electric power cable jointing on solid-type cables up to and including 11kV\nIssue 1, 1978\n12-16\nFuse-switch trip testing device\nIssue 1, 1978\n12-18\nPolyester resin/glass fibre protection boxes and protective shrouds for oil-filled and gas-pressure cable accessories\nIssue 1, 1980\n12-19\nSingle phase street lighting cut-outs-25A rating\nIssue 1, 1982\n12-20\nLow voltage pole-mounted fuses\nIssue 1, 1984\nCorrigendum 1, 1986\n12-23\nPolythene protection tape for buried electricity supply cable\nIssue 1, 1988\n12-24\nPlastic ducts for buried electric cables\nIssue 1, 1989\n13-1\nPortable glass fibre ladders and steps\nIssue 1, 1987\n23-2\nCode of practice for post weld heat treatment (electrical resistance heating elements)\nIssue 2, 1983\n23-3\nTitanium tubes for heat exchangers and condensers\nIssue 3, 1989\n23-4\nSeamless steel feed water heater tubes for high pressure applications\nIssue 2, 1989\n26-1\nInsulating foam-filled tube and solid rod for live working\nIssue 2, 1977\n26-2\nInsulating tools for live working on high voltage overhead lines\nIssue 1, 1978\n26-3\nHand held tools for live low voltage working\nIssue 2, 1984\n26-4\nOverhead line conductor erection clamps-test specification and test certificates\nIssue 1, 1980\n35-1\nDistribution transformers (from 16kVA to 1000kVA)\nIssue 4, 1985\n35-2\nEmergency rated system transformers (35/11.5kV delta/star and star/star connected)\nIssue 4, 1982\n35-5\nGenerator voltage transformers for 500/660 MW turbo-generators\nIssue 1, 1980\n35-6\nGenerator voltage transformers for gas turbines\nIssue 1, 1980\n35-14\nFormel NF filled transformers\nIssue 1, 1984\n37-1\n415V ac switchgear, controlgear and fusegear\nIssue 2, 1977\n37-2\nL.V. distribution fuseboards\nIssue 2, 1984\n37-3\nA.C. metal-enclosed switchgear and controlgear of rated voltages 3.6kV and 12kV\nPart 1-Circuit breaker equipment (air-break)\nIssue 1, 1981\nPart 2-Fused switching device equipment of 3.6kV rated voltage\nIssue 1, 1981\n41-1\n3.3kV 150 MVA airbreak switchgear-floor details and building requirements\nIssue 1, 1969\n41-2\n11kV distribution switchgear (floor details)\nIssue 2, 1976\n41-4\n11kV 500 and 750 MVA airbreak switchgear floor details and building requirements\nIssue 1, 1970\n41-5\nRequirements for 12kV distribution metal-enclosed indoor switchgear\nIssue 3, 1983\n41-6\n132kV outdoor busbar type substations with aluminium connections\nIssue 1, 1974\n41-7\n132kV outdoor substations extensible up to four-switch mesh\nIssue 1, 1980\n41-8\n132kV compact transformer feeder substations\nIssue 1, 1980\nAmendment 1, 1988\n41-9\nInsulating oil handling and storage equipment for 132kV outdoor substations\nIssue 1, 1974\n41-10\nSwitchgear for use on 66, 132, 275 and 400kV systems\nIssue 3, 1989\n41-11\nTubular aluminium busbars, connections and terminal fittings for 132kV outdoor substations\nIssue 2, 1982\n41-12\nNon-extensible ring main equipments, (incorporating an automatic fuse-switch and switches ratings: 250 MVA at 11kV and 150 MVA at 6.6kV)\nIssue 2, 1975\nCorrigendum No. 1, 1987\n41-13\nAir break switch-disconnectors 12kV to 36kV for use on overhead lines\nIssue 1, 1978\n41-15\nStandard circuit diagrams for equipment in 132kV substations\nPart 1: Transformer feeder, transformer end\nIssue 1, 1978\nPart 2: Transformer feeder, transformer end 132/11/11kV dual secondary\nIssue 1, 1978\nPart 3: Arrangements for locally banking two transformers. Transformer end of a transformer-feeder\nIssue 1, 1982\nPart 4: 132kV busbar substation feeder-circuits\nIssue 1, 1983\nPart 5: Intertripping over voice frequency channels\nIssue 2, 1988\nPart 6: Standard circuit diagrams for equipment in 132kV substations. Bus-section and bus-coupler\nIssue 1, 1990\nPart 7: Arrangements for locally banking a transformer with a feeder at a busbar station\nIssue 1, 1988\nPart 8: 132kV busbar station-busbar protection\nIssue 1, 1986\nPart 9: Standard circuit diagrams for equipment in 132kV substations ac traction supplies to British Rail\nIssue 1, 1990\n41-16\nApparatus terminations, conductor sizes and associated fittings (copper) used in outdoor and indoor substations with outdoor equipment\nIssue 2, 1981\n41-18\nArrangements for partial discharge testing of bushings, capacitors, instrument transformers and switchgear of rated voltage 7.2-425kV inclusive\nIssue 1, 1988\n41-19\nOpen type switchgear for use on 33kV systems\nIssue 1, 1979\n41-21\nPortable earthing equipment for open type hv apparatus in substations\nIssue 1, 1985\n41-22\nMetal-enclosed switch, switch-disconnector and earthing switch combinations (ratings 12.5, 16 and 20kA at 7.2kV and 12kV)\nIssue 1, 1982\n41-23\nMetal-enclosed automatic fuse-switch equipment (ratings 12.5, 16 and 20kA at 7.2kV and 12kV)\nIssue 1, 1982\n43-1\nSurvey and preparation of ground line profiles and plotting of tower positions for steel tower overhead transmission lines at 132kV and higher voltages\nIssue 2, 1986\n43-2\nDesign of steel tower overhead transmission lines at 132kV and higher voltages\nIssue 1, 1972\nCorrigendum 1989\n43-3\nDesign of lattice steel transmission towers for overhead lines at 132kV and higher voltages\nIssue 1, 1972\n43-4\nDesign of foundations for steel towers for overhead transmission lines at 132kV and higher voltages\nIssue 2, 1986\n43-5\nFabrication and galvanising of tower and foundation steelwork for overhead transmission lines at 132kV and higher voltages\nIssue 2, 1986\nCorrigendum 1988\n43-6\nConstruction of overhead transmission lines on steel towers for 132kV and higher voltages\nIssue 2, 1986\n43-7\n132kV steel tower transmission lines: Specification L4(M)-1978\nIssue 2, 1985\n43-8\nOverhead line clearances\nIssue 2, 1988\nAmendment 1989\n43-9\n132kV steel tower transmission lines specification L.7(C)-1978 2 x 175mm2 ACSR per phase-1 x 175mm2 ACSR earthwire\nIssue 1, 1986\n43-11\n400kV steel tower transmission lines-specification L.12 (2 x 700mm2 AAAC per phase) (1 x 425mm2 AAAC earthwire)\nIssue 1, 1984\n43-12\nInsulated aerial bundled conductors erection requirements for 1v overhead distribution systems\nIssue 1, 1986\nCorrigendum 1, 1987\nCorrigendum 2, 1988\n43-13\nAerial bundled conductors (ABC) insulated with cross-linked polyethylene for low voltage overhead distribution\nIssue 1, 1986\nCorrigendum September 1987\n43-14\nConductor fittings and associated apparatus for use with 1v aerial bundled conductors\nIssue 1, 1989\n43-15\nInsulator binds and equivalent helical fittings for overhead lines\nIssue 1, 1988\n43-30\nLow voltage overhead lines on wood poles\nIssue 2, 1981\n43-40\nHigh voltage single circuit overhead lines on wood poles\nIssue 1, 1988\n43-50\n132kV single circuit overhead lines on wood poles\nIssue 1, 1984\nCorrigenda April and July 1985\nCorrigendum December 1987\n43-81\nPortable earthing equipment for high voltage overhead lines up to and including 66kV\nIssue 1, 1984\n43-88\nTreatment of wood poles and associated timber for overhead lines\nIssue 3, 1988\n43-90\nAnti-climbing devices for hv lines up to and including 400kv\nIssue 2, 1979\n43-91\nStay strands and stay fittings for overhead lines\nIssue 4, 1984\n43-92\nConductor fittings for overhead lines\nIssue 2, 1985\nCorrigendum 1986\n43-93\nLine insulators\nIssue 3, 1986\nCorrigendum December 1986\n43-94\nEarth rods and their connectors\nIssue 2, 1977\n43-95\nSteelwork for overhead lines\nIssue 5, 1989\n43-96\nFasteners and washers for wood pole overhead lines\nIssue 2, 1986\n43-97\nSteel overhead line supports\nIssue 1, 1990\n44-1\nCarbon brushes (for rotating electrical machines)\nIssue 2, 1971\n44-2\nElectric motors-dimensions\nIssue 1, 1970\n44-3\nElectric motors-specification (3300V and above)\nIssue 2, 1980\nErratum 1983\n44-4\nElectric motors-specification (415V and below, 0.75kW and above)\nIssue 2, 1980\n44-5\nTesting the insulation systems of stator coils for rotating electrical machines\nIssue 4, 1987\n44-7\nTesting the insulation systems of bars (half coils) for rotating electrical machines of turbine driven and hydro-generator types\nIssue 1, 1978\n48-1\nStatic relays-dimensions\nIssue 1, 1969\n48-2\nFault passage indicators for 6.6kV and 11kV underground and overhead distribution systems\nIssue 1, 1974\n48-3\nInstantaneous high-impedance differential protection\nIssue 1, 1977\nAmendment 1, 1987\n48-4\nD.C. relays associated with a tripping function in protection systems\nIssue 3, 1983\n50-1\nDirect reading pressure gauges (for oil-filled cable systems)\nIssue 2, 1977\n50-2\nBimetallic ammeters\nIssue 1, 1975\n50-3\nCode for transmitting and recording metering and associated information\nIssue 1, 1975\n50-4\nAnalogue direct current signal for plant instrumentation and control systems\nIssue 1, 1978\nAddendum 1979\n50-5\nStandardised contact sensing circuits\nIssue 1, 1983\n50-6\nPressure switches for oil-filled cable systems\nIssue 1, 1986\n50-7\nToken-operated prepayment watt-hour meter-Class 2\nIssue 1, 1986\n50-8\nToken acceptor for operation in conjunction with credit watt-hour meter\nIssue 1, 1986\n50-18\nDesign and application of ancillary electrical equipment\nIssue 2, 1989\n56-1\nFerritic steel valve castings\nIssue 2, 1989\n62-1\nBoiler feed pump impeller castings\nIssue 1, 1981\n62-2\nAsh pumps\nIssue 2, 1988\n62-3\nMain circulating water pump impeller castings\nIssue 1, 1983\n62-4\nInspection and testing of boiler feed pump shafts, casings, impellers and diffusers\nIssue 1, 1983\n66-1\n0.5% Chromium, molybdenum, vanadium steel castings for steam turbines\nIssue 2, 1989\n66-2\n2.25% Chromium, molybdenum steel castings for steam turbines\nIssue 1, 1989\n66-3\nCarbon steel castings for steel turbines\nIssue 1, 1989\n68-1\nTubes and tube assemblies for boilers\nIssue 2, 1988\n68-2\nAcceptance levels for radiographic examination of flash butt welds in steel tubes\nIssue 1, 1983\n98-1\nSurface preparation and paint finishing of new plant and equipment\nIssue 1, 1971\n98-2\nUltrasonic probes\nIssue 1, 1979\n98-4\nUltrasonic testing of ferritic steel castings\nIssue 2, 1989\n98-5\nAutomatic ultrasonic testing of steel tubes\nPart 1: Seamless and welded tubes, outside diameters of 12mm up to but not including 160mm\nIssue 3, 1989\nPart 2: Seamless tubes, outside diameters 160mm and above\nIssue 3, 1989\nPart 3: Longitudinally submerged arc welded steel tubes, outside diameters 160mm and above\nIssue 2, 1989\nPart 4: Longitudinally electric resistance and induction welded steel tubes, outside diameters 160mm and above\nIssue 2, 1989\n98-6\nUltrasonic testing of ferritic steel plate\nIssue 1, 1981\n98-7\nUltrasonic probes: normal (0 degs) compression wave probes for contact testing\nIssue 1, 1982\n98-8\nUltrasonic probes: low frequency single crystal shear wave angle probes\nIssue 1, 1982\n98-9\nUltrasonic flaw detectors\nIssue 1, 1985\nAmendment No.1 1987\n98-10\nManual ultrasonic testing of welds in ferritic steel sections\nPart 1: Butt welds in ferritic steel sections greater than 10mm thick\nIssue 2, 1984\nPart 2: Nozzle, branch, stub and attachment welds\nIssue 1, 1983\nPart 3: Butt welds in tubes of outside diameters between 25mm and 120mm inclusive\nIssue 2, 1984\nPart 4: Guidance on inspection capability and joint design\nIssue 1, 1988\n98-11\nRadiographic testing of steel castings\nIssue 2, July 1989\n98-12\nCalibration and routine performance checks of ultrasonic NDT equipment\nIssue 1, 1989\n98-13\nManual ultrasonic testing of forgings for turbine and generator rotors, shafts and discs\nIssue 2, 1989\n98-14\nUltrasonic testing procedures for non-magnetic generator coil retaining ring forgings\nIssue 2, 1989\n98-15\nAutomatic eddy current testing of tubes\nPart 1: Detection of imperfections in welded titanium tubes\nIssue 2, 1989\nPart 2: Verification of hydraulic leak tightness of steel tubes\nIssue 2, 1989\nPart 3: Detection of imperfections in steel tubes\nIssue 2, 1989\n98-16\nDefect evaluation and size estimation by the manual ultrasonic testing method\nIssue 1, 1989\n98-17\nRadiographic examination of fusion welded butt joints in steel\nIssue 1, 1989\n98-18\nCapability of magnetic particle inspection\nIssue 1, 1989\n98-19\nAcceptance criteria for pipe circumferential butt welds\nIssue 1, 1989\n98-20\nPenetrant flaw detection capability\nIssue 1, 1989\n98-21\nMagnetic particle and dye penetrant testing materials. Chemical compatibility and health hazards\nIssue 1, November 1989\n98-22\nCapability of ultrasonic testing of ferritic steel forgings\nIssue 1, 1989\n98-23\nUltrasonic and visual inspection of components lined with tin based white metal\nIssue 1, 1989\nCJ1101M\nVertical, horizontal or inverted indoor sealing end for 6350/11,000V single-core cables up to and including 1000mm2 (does not provide for the jointing of milliken conductored cable)\n76\nCJ1102M\nVertical outdoor sealing end for 6350/11,000V single-core cables up to and including 1000mm2 (does not provide forthe jointing of milliken conductored cable)\n76\nCJ1103\nCrepe paper insulated straight through joints for belted three-core 11kV pre-impregnated or mass-impregnated non-draining solid type cables with stranded aluminium conductors\n70\nL6\n400kV steel tower transmission lines with 4 x 0.4 sq.in. cu equiv SCA conductors per phase\n66\nAmendment 1, 1969\nM3\nRestricted hour and time of day tariff time switches\n73\nS1\nGeneral technical specification for standard 33kV indoor metalclad switchgear, 750MVA and 1000MVA ratings\n65\nErrata slip, 1965\nS10\nStandard steelwork, etc for 11kV pole-mounted air-break isolators\n63\nS12\nStandard numbering for small wiring for switchgear and transformers together with their associated relay and control panels 1964\nAmendment 1, 1969\nS17\nPartial discharge testing of demountable synthetic resin-bonded and oil-impregnated paper bushings of rated voltage 22kV and above\n68\nT2\nTransformers and reactors\n66\nInterim index and general requirements\nSchedules of general particulars and guarantees\nSection 1: Generator station and unit transformers\nSection 2: Transmission transformers (excluding auto-transformers): general design and performance\nSection 3: Auto-transformers: general design and performance\nSection 4: Oil-immersed auxiliary transformers for power stations: general design and performance\nSection 5: Air insulated auxiliary transformers for power stations: general design and performance\nSection 6: Earthing and auxiliary transformers for transmission stations: general design and performance\nSection 7: Oil-immersed series and shunt reactors\nSection 8: Magnetic circuits\nSection 9: Windings, connections and terminal markings\nSection 10: Minimum safety and external air clearances and co-ordinating gaps\nSection 11: Bushings and terminals Revised\n76\nSection 12: Cable boxes, cable sealing-end chambers and disconnecting chambers Revision 2,\n88\nSection 13: Noise and vibration\nAmendment 1, 1970\nAmendment 2, 1977\nSection 14: Earthing systems and connections\nSection 15: Tanks, conservator vessels and pressure relief devices\nAmendment 1, 1976\nSection 16: Valves, drain and air release plugs and oil sampling devices Revision 1, 1982\nSection 17: Cleaning and paint or other protective systems\nSection 18: Dehydrating breathers\nSection 19: Oil level gauges\nSection 20: Radiators, cooling-banks and oil/water coolers\nAmendment 1, 1976\nSection 21: Rating and diagram plates, valve location and function plates, terminal identification plates and labels\nSection 22: Oil circulating pumps\nSection 23: Fans\nSection 24: Motors\nSection 25: Electrical control of cooling equipment\nSection 26: Tap changing equipment (excluding single compartment types)\nSection 27: Electrical control of on-load tap change equipment\nAmendment 1, 1978 Errata slip, 1979\nSection 28: Temperature indicators for oil immersed transformers and reactors Revision 1, 1980\nSection 29: Gas and oil-actuated relays\nSection 30: Oil flow indicators, oil pressure gauges and differential pressure gauges\nSection 31: Marshalling kiosks and cubicles\nSection 32: Terminal housing for secondary wiring\nSection 33: Control connections, instrument wiring, interconnecting cables, terminal blocks and fuses\nSection 34: Drying out, transport and erection\nT3\nTransformers for 33kV and 22kV systems (up to 20 MVA) 1962\nAmendment 1, 1964\nAmendment 2, 1965\nAmendment 3, 1966\nAmendment 4, 1966\nAmendment 5, 1969 Guide on impulse voltage testing power transformers and reactors\nC1/7\nType approval tests for 33kV mass impregnated paper-insulated solid type cable systems including non-draining types\n81\nC5\nHouse service overhead systems (HSOS) cables\n51\nC7/1\nUse of earthed and unearthed type cables on 33kV and lower voltage systems\n52\nC16\nColours of PVC conductor\n54\nC25/2\nCode of practice on the design of straight through branch and service joints for use on paper insulated lead sheathed cables operating at voltages up to 600/1000 volts\n73\nC28/4\nType approval test for impregnated paper insulated gas pressure and oil-filled power cable systems from 33 to 132kV inclusive\n75\nAmendment 1, 1978\nAmendment 2, 1981\nC34/1\nCode of practice on the design of straight-through and branch jointsfor use on paper-insulated lead-sheathed cables operating at voltage from 3300V up to 11,000V\n76\nC39/5\nIdentification of buried plastic sheathed cables\n75\nC43/1\nDimensions of copper terminal stems for sealing ends of outdoor or indoor type but not oil-immersed sealing ends\n66\nC46/1\nMeasures necesssary to prevent corrosion damage to buried metallic structures by neighbouring cathodic protection installations\n81\nC47/1\nType approval tests for single-core impregnated paper-insulated gas pressure and oil-filled power cable systems for 275 and 400kV\n75\nAmendment 1, 1978\nAmendment 2, 1981\nAmendment 3, 1983\nC48/1\nType approval tests for anti-corrosion coverings for pressure type cables including pipeline cables\n74\nC53\nVertical outdoor sealing ends for 22kV up to 1.5 sq in screened or unscreened mass-impregnated or non-draining solid type cables\n65\nC55/4\nInsulated sheath power cable systems\n89\nC61\nInstallation bending radii of 33kV and higher voltage cables\n67\nC62/3\nCurrent ratings of copper and aluminium conductored PVC insulated and PVC sheathed HSOS cable\n71\nC64\nTesting procedure for approval of joints for cables generally to BEBS C5\n69\nAmendment 1, 1969\nAmendment 2, 1973\nAmendment 3, 1977\nC66/1\nType approval testing procedure: protective boxes for use with buried accessories employed on 33kV-400kV insulated sheath power cable (and for sheath sectionalising insulation embodied in such accessories)\n79\nC67\nSpecification for impregnated paper-insulated solid type cables for voltages up to and including 33,000 volts and PVC insulated cables for voltages up to and including 3300 volts\n70\nAmendment 1, 1970\nAmendment 2, 1971\nC68\nMethod of terminating the carbon paper screen on 11kV belted multicore cables\n70\nC79\nType approval tests for connectors and terminations for aluminium conductors of insulated power cables\n72\nAmendment 1, 1981\nAmendment 2, 1982\nC81/3\nType approval tests for joints for 600/1000 volt cable systems\n86\nC82\nPulling-in 11kV aluminium sheathed, consac and waveform cables\n77\nC84\nOperation of oil-filled cable systems\n76\nC89\nPerformance specification for terminations on polymeric insulated cables rated at 12kV and 36kV maximum system voltage\n86\nC90\nType approval tests for straight joints for 6350/11,000 volts three-core mass impregnated non-draining paper insulated solid cables\n84\nC92\nPerformance specifications for pole top terminations on\n6350/11,000V paper insulated cables\n87\nPart 1: Non-metallic pole boxes for mass impregnated non-draining (MIND) solid type cable\nC93\nType approval tests for mechanical connectors to metallic sheath of cables\n89\nG5/3\nLimits for harmonics in the UK electricity supply system\n76\nG10\nStandardisation of service intake arrangements for system building\n65\nG12/2\nNational code of practice on the application of protective multiple earthing to low voltage networks\n82\nG14\nProtective multiple earthing: recommended principles of testing to ensure correct polarity\n71\nG15\nStandardisation of electricity supply arrangements in industrialised component buildings 1971\nG16\nStandard specification for a new single-phase service termination/metering up to 100A\n1972\nG17/3\nLeakage of flammable gases: recommendations\n1988\nG18\nOperation of air break isolating switches: recommendations\n1974\nG19/1\nModel guidelines for operations or work on the premises of consumers receiving hv supply\n1977\nG21\nAssessment of oil handling and storage plant requirements for 132kV outdoor substations\n1975\nG22/2\nSuperimposed signals on public electricity supply network\n1984\nG24\nCode of practice for the safe operation of ground-mounted dependent manual closing oil switches and oil circuit breakers at 11kV and 6.6kV\n1975\nG27\nMobile radio systems-modulation in the VHF middle band\n1975\nG28/3\nNational Equipment Defect Reporting Scheme-notes of guidance\n1989\nG29\nFarm hygiene: precautions to prevent spread of animal and poultry diseases\n1977\nG30/1\nGuidance on pole top rescue procedures\n1986\nG31\nRecommended colour code for control boards, diagrams and wall maps\n1976\nG32/1\nGuide to safety in the storage, handling and use of highly flammable liquids and liquefied petroleum gases\n1985\nG35\nPrecautions to be taken by persons working in the vicinity of overhead lines on construction sites\n1977\nG38/1\nOperational procedure associated with electricity supplies for traction purposes on a.c. and d.c. electrified lines\n1985\nG39\nModel code of practice covering electrical safety in the planning, installation, commissioning and maintenance of public lighting and other street furniture\n1979\nG42/1\nOverhead lines in the vicinity of recreational sites\n1983\nG44\nMandatory procedure for the co-ordination of power line carrier system frequencies\n1980\nG45/1\nNotes of guidance for Electricity Boards on the use of irrigators, slurry guns and high pressure hoses in the vicinity of overhead lines\n1983\nG46\nThe maintenance of electrical plant and equipment up to and including 132kV\n1981\nG48\nRemedial measures for Enfield 132kV gas compression cable sealing ends\n1981\nG49\nJointing instructions for 132kV and 275kV compression cables, fittings and ancillary equipment (Pirelli Enfield)\n1981\nG50\nMaintenance of 132kV gas compression sealing ends\n1986\nG51\nGuidance notes on control of access to high voltage compounds with disconnectors used in the fault interfering mode\n1981\nG53\nRadio communications in an emergency-system design and operational recommendations to achieve maximum reliability and flexibility\n1982\nG54\nOperational procedures for helicopter use within the ESI\n1982\nG55\nThe avoidance of danger from overhead electric lines and underground electric cables in forests and plantations\n1983\nG56\nSpecial requirements for the access of Boards' staff to British Railways Board operational land for inspection purposes and work\n1987\nG57\nCable laying on agricultural land\n1983\nG58/1\nPurchase, use, storage, inspection and maintenance of hand held insulated tools for live working up to 1000 volts\n1986\nG59\nRecommendations for the connection of private generating plant to the Electricity Boards' distribution systems\n1985\nG61\nHandling of electrostatic sensitive devices\n1985\nG62\nOperational safety when working in the vicinity of live high voltage overhead lines\n1985\nG64\nSafety in cableways\n1986\nG66\nGuidance on the specification, use and maintenance of portable lifting equipment in Area Boards\n1986\nG67\nGuidance on safety in conductor stringing on overhead lines\n1987\nG68\nThe fault performance of non-auto-reclosing oil circuit-breakers intended for 11kV (250MVA) underground distribution networks\n1988\nG69\nGuidance on the safety aspects of work on sulphur hexaflouride filled distribution equipment up to 145kV\nG70\nVegetation control near overhead lines\n1989\nG71\nPurchase, storage, use, inspection and maintenance of insulating mats for electrical purposes up to 650V\n1989\nL9/2\nTesting of wood poles prior to climbing or use as a support\n1978\nL13/1\nStreet lighting brackets fixed on joint user poles with the Post Office\n1960\nL15/4\nNotes on use of PVC insulated hv conductors (up to 11kV) as protection for Post Office open wires or aerial cable\n1968\nL32/1\nRecommended procedure for erecting Area Board overhead lines over motorways\n1975\nL36\nMetric profile scales\n1971\nL37\nOverhead transmission steel tower line construction: code of behaviour\n1971\nL38\nProtective greasing of PVC covered copper and bare and PVC covered aluminium based overhead line conductors\n1981\nL41\nUse of home grown wood poles for overhead line supports\n1987\nM1/2\nStandardisation of equipment required for kW maximum demand metering on consumer’s premises\n1956\nM3\nMeter voltage markings\n1951\nM7/1\nCertification of meters other than kWh meters\n1956\nM10/3\nSerial numbering of meters\n1988\nM11/1\nStandardisation of accuracy requirements for new meters\n1970\nM12/1\nStandard wiring polyphase metering equipments\n1957\nM15/4\nFused flexible leads for use with portable voltage measuring instruments at voltages up to 600 volts ac/dc\n1981\nM25/1\nImproving the security of meters and associated service equipment\n1988\nM26/2\nStandard purchasing requirements for single phase, one rate and two rate house service credit meters\n1988\nM28\nConsumers' attachments to Boards' meters\n1988\nM29\nFacilities offered to customers from Area Board metering equipment\n1989\nP1/3\n275/33kV, 132/33kV and 132/11kV supply point transformers\n1969\nP2/5\nSecurity of supply\n1978\nP3/1\nLoad reduction by voltage adjustment\n1977\nP4\nPower factor improvement\n1955\nP5/5\nDesign of low voltage underground networks for new housing estates\n1987\nP10\nVoltage control at bulk supply points\n1965\nP11/1\nCompact 132/33kV substations\n1969\nP14\nPreferred switchgear ratings\n1971\nP15\nTransformer loading guide-a guide to the loading of double-wound transformers having nominal ratings of 120MVA and below. Supplying systems at 66kV and below from the supergrid and 132kV system\n1971\nP16\nEHV or hv supplies to induction furnaces\n1975\nP17\nCurrent rating guide for distribution cables\nPart 1: 11kV cables\nPart 2: 33kV cables\n1976\nAmendment 1, 1978\nP18\nComplexity of 132kV circuits\n1978\nP19\nProcedure for the planning and design of 132kV systems\n1979\nP20/1\nEarthing policy in relation to the customer’s installations\n1989\nP23\nConsumers' earth fault protection on single phase supplies up to 100A for compliance with the 15th edition of the IEE Wiring Regulations for Electrical Installations\nP24\nAC traction supplies to British Rail\n1984\nAddendum, 1990\nP25\nThe short-circuit characteristics of Electricity Boards' low voltage distribution networks and the co-ordination of overcurrent protective devices on 240V single phase supplies up to 100A\n1984\nP26\nThe estimation of the maximum prospective short-circuit current for three phase 415V supplies\n1985\nP27\nCurrent rating guide for high voltage overhead lines operating in the UK distribution system\n1986\nP28\nPlanning limits for voltage fluctuations caused by industrial, commercial and domestic equipment in the United Kingdom\n1989\nP29\nPlanning limits for voltage unbalance in the United Kingdom\n1990\nP01\nPost Office Memorandum A80(e): Protection of Post Office lines from contact with low or medium voltage power lines\n1975\nP02\nPost Office Memorandum A231(b): Protection of Post Office lines from high voltage power lines\n1975\nP04/1\nServices to British Telecom Public Telephone Housings\n1988\nS2/4\nLimitation of fire risk in substations at 132kV and below and in enclosed cableways\n1976\nS3/1\nMetering current transformers for use in switchgear\n1978\nS5/1\nEarthing installations in substations\n1966\nAmendment 1, 1969\nAmendment 2, 1970\nAddendum 1969\nS15\nStandard schematic diagrams\n1956\nPart 1: Schematic diagrams\nPart 2: Alarm schemes\nPart 3: Basic diagrams for voltage and current transformer secondary circuits\nAmendment 1, 1970\nAmendment 2, 1988\nPart 4: Circuit diagrams for 6.6/11kV standard distribution switchgear\nS17\nGuide for light current control, indication and alarm equipment\n1960\nAmendment 1, 1964\nS26\nAluminium busbar installations for use in 33kV outdoor substations\n1968\nS30\nUprating 132kV 3500MVA substations to 5000MVA\n1973\nS31\nIncrease in single-phase earth fault rating at 132kV 3500MVA substations\n1973\nS33\nSwitchgear current ratings at reduced ambient temperature (excluding fuses)\n1982\nS34\nA guide for assessing the rise of earth potential at substation sites\n1986\nAmendment 1, 1986\nAmendment 2, 1988\nS35\nRemedial measures for 11kV outdoor groundmounted switchgear\n1987\nS36\nProcedure to identify and record “hot” substations\n1988 EB/BT.1 Conditions for British Telecom and Electricity Board joint use of poles 1982\nTELE.1\nThe Electricity Boards' practices for the design, installation, operation and maintenance of telecommunication systems\n1983\nT1\nSystem phasing\n1949\nT3\nAutomatic voltage control at grid supply points\nT8/6\nThe cost of losses for transformers used on distribution systems\n1987\nACE1\nPower factor improvement\n1953\nSection: Recommendations\nACE3\nUse of series capacitors in power systems\n1956\nAddendum 1965\nSection 3\nACE11\nStandardisation of auto-reclosing facilities on 11kV ground-mounted metalclad distribution switchgear\n1966\nAddendum 1971\nSections 3, 4, Addendum\nACE14\nGuide and report on high voltage live line working on overhead lines carried out on steel, wood or concrete supports up to and including 132kV\n1974\nRevision 2 (1983) to Section 2\nAll Sections\nACE21\nGuide and report on medium and low voltage live line working\n1969\nAll Sections\nACE23\nGuide to the provision of electronic telecontrol equipment for Area Electricity Boards\n1969\nAll Sections\nACE24\nStandardisation of coding for ripple control signals\n1969\nAll Sections\nACE30\nRecommended procedure for the selection of power line carrier frequencies\n1972\nAll Sections\nACE44\nPulling-in aluminium-sheathed cable\nPart 1: 11kV belted corrugated type 1975 Section 5\nPart 2: 11kV screened corrugated type, 11kV belted smooth-sided type, consac cable\n1978 Section 6\nACE46\nThe maintenance of electrical plant and equipment up to and including 132kV\n1981\nAll Sections\nACE51\nThe application of ER P2/5. Security of Supply\n1979\nACE54\nAuto-reclosing schemes for 11kV distribution networks\n1977\nSections 7, 11, Appendices\nACE55\nLightning protection for networks up to 132kV\n1977\nAll Sections\nACE57\nGuide to mechanical aids used for cable laying and overhead line erection\n1977\nAll Sections\nACE59\n132kV delayed auto-reclosing schemes\n1977\nAll Sections\nACE67\nReliability investment in radial hv distribution systems with overhead lines\n1979\nACE68\nCode of practice on the guarding of roadworks\n1979\nAll Sections\nACE80\nGuide to the maintenance of electrical plant up to and including 132kV\n1981\nAll Sections\nACE105\nReport on the design of low voltage underground networks for new housing\n1986\nAll Sections\nET106\nRemedial measures for outdoor ground-mounted switchgear\n1987\nAll Sections\nET110\nTest procedures to determine the capability of cable screens to withstand fault currents from internal failures\n1989\nAll Sections\nET112\nHarmonic impedance of supply systems\n1988\nSection 7\nET113\nNotes of guidance for the protection of private generating sets up to 5MW foroperation in parallel with Electricity Boards' distribution networks.\n1989",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1990/888/schedule/part/I",
    "retrieved_at": "2026-10-29T15:21:23.093058+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}