# The Wireless Telegraphy Apparatus (Low Power Devices) (Exemption) Regulations 1989, Paragraph 3: Induction system apparatus


That part of an induction system –
(a) designed or adapted to produce –
(i) a controlled magnetic field; and
(ii) a predetermined recognisable signal when operating within that magnetic field; and
(b) constructed so as to be capable of use only on frequencies, and at an output power, or field strength, as the case may be, not exceeding the maximum for such frequencies for each description of apparatus, specified in the table below –
Frequencies
Apparatus with terminals for connection to an external loop antenna: Maximum output power
Apparatus with ferrite or coil antennas: Maximum field strength
0 – 185 kHz
10 W
265 μA/m or 100 mV/m
240 – 315 kHz
10 W
17 μA/m or 6.4 mV/m

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Source: https://www.legislation.gov.uk/uksi/1989/604/schedule/paragraph/3 (the official version)
Page: https://openlegislation.uk/wireless-telegraphy-apparatus-low-power-devices-exemption-regulations-1989/schedule/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.