Paragraph 84 HVDC InstallationI1

High Voltage – DC Construction - The Communications Code 2003, Part 10 provides for the protection of Code Operator Networks from potential damage which may be caused as a result of a new construction introduced by other undertakers.

Where a proposed new HV/DC construction is likely to come close to existing BT Network, Infrastructure or Exchange building, it is for the undertaker to carry out the necessary evaluation, to determine whether, as a result of that proposed construction, if there is a likelihood of physical damage, electrical interference or interruption to BT’s Network.

Where the evaluation identifies potential for such damage or interference, it is for the undertaker to decide the level and nature of mitigation required to eliminate that risk. In order to support the evaluation, the operator will provide a full list of Network Cable types, building diagrams and policy requirements for the Telecommunications apparatus. If the undertaker requires more specific information, a more detailed site study can be provided by the operator. The latter is a significant undertaking and one which would be chargeable.

The undertaker’s evaluation must cover all aspects of any potential interference both physical and safety during any proposed alterations and the potential impact once the undertaker’s apparatus is operational, that is potential impact from outages or maintenance routines after installation is complete. Any alterations must be within the operator’s planning policy tolerance and agreed at each stage and for any alterations during build that are altered from the original specification.

Where the mitigation proposed by the undertaker involves shifting or re-arrangement of the operator’s Network or infrastructure, that can be arranged and agreed though the operator’s Network Re-Arrangement Team, who can provide an estimate of costs for the work required and will work with the undertaker to arrive at an agreed solution to protect the operator’s assets.

Whilst the operator may carry out mitigation works as requested by the undertaker; it bears no responsibility for the effectiveness of that solution. Such responsibility lies with the undertaker.