Technical Information Power And Control Cables Power Appendixes Guide to the Wiring Regulations Protective conductors Page Protective conductors
| Protective conductors |
| Protective earthing requires exposed-conductive-parts (of electrical equipment, likely to become live in the event of a fault) to be connected (by protective conductors) to the main earthing terminal of the electrical installation. In the event of a fault, suffcient current will fow around the earth fault loop to cause the operation of the fault protective device (fuse, circuit breaker or RCD) and disconnect the fault. |
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Protective bonding conductors reduce the magnitude of voltages during fault conditions. It should be remembered that the following are all types of protective conductor: * Circuit protective conductors (cpc); * Protective bonding conductors; * Earthing conductors. |
| It is important to establish and use the correct terminology; earthing conductors are often confused with cpcs. |
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* Always use metal conduit or trunking as a cpc where it is installed. * If cable tray or ladder rack is used to support cables use it as a main bonding conductor. * Utilize as much of other services and constructional material as possible for bonding. * Utilize the structural steel for bonding. |
