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EXCAVATING NEAR POWER CABLES

Information for Excavating Contractors

It is a fundamental responsibility for any person intending to excavate, that they determine whether or not there are any services in the vicinity before commencing work.

Northpower will provide information on the location of its underground power cables in public roads/footpaths generally by providing copies of plans where possible, or by marking on site using cable location equipment and red or orange spray paint.

If adequate notice is given (e.g. 2 working days) this service, together with any on site supervision (which we may deem necessary to avoid damage to our installation) is at present free during our normal working hours (7.30 a.m. to 4.00 p.m. weekdays). Charges will be made for services provided at other times, and we reserve the right to charge if less than 2 working days notice is given.

Information on the location of underground cables can be obtained by contacting Northpower's head office.

Email: info@northpower.com
Phone: (09) 430 1803
Post: Northpower, Private Bag 9018, Whangarei.

It must not be assumed that information provided by plan or marked on site is absolutely accurate, e.g. cable locators are not perfect, building lines or curb lines (from which measurements were taken at cable installation time) may have shifted, and depths may have changed due to road/footpath reconstruction. For this reason we advise that mechanical digging aids must not be used within 450mm of a power cable, for obvious safety reasons. Where the location of cables is not certain, hand digging to locate them must take place before mechanical diggers are used, in order to comply with the 450mm clearance. Power cables may be direct buried with timber, concrete or plastic slab above for mechanical protection, or inside ducts. Installations may also have an orange plastic danger tape indicating electrical cables below. Any mechanical protection or warning tape which is disturbed by excavation must be replaced in its original position.

Whilst reasonably robust, electrical cables should be treated carefully. They should not be moved without specific approval. Some rely on paper for insulation, and any kinking can result in electrical breakdown with the risk of explosion.

Repairs can be expensive and costs are chargeable. Nevertheless, it is absolutely essential that any damage, or suspected damage to a power cable is reported immediately to Northpower faults on: (09) 430 1800.

Please note that we do have to retain the right (through the local OSH Department if necessary) to prevent work continuing, which is likely to damage any Northpower installation, or is likely to cause serious harm to any person.

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