RCD Upgrading


The majority of electrical installations carried out after 1966 should have been wired in PVC insulated cables and therefore full rewiring may not be needed. These installations may only need upgrading to bring up to date with current regulations.

Items often needing upgrading include:

Earthing and Bonding. There have been a significant number of improvements in this area to try and make electrical installations safer. Most importantly the main bonding of the Gas and Water services at the meter / main stop tap.

Old Fuse Boxes fitted with “Out of Date” rewireable fuse.

Old Consumer Unit recently removed from 1980's property
Old Consumer Unit recently removed from 1980’s property

Although these type of fuses are still permitted by regulations, they do not offer the best protection to the cables installed and they do not offer any protection against fatal electrical shock.

Rewireable fuse (BS 3036) also give rise to an incorrect fuse wire being fitted and as we have often seen anything that may be to hand to get the circuit working again, such as a nail, a piece of copper wire, tin foil, etc…

Some older fuse boxes are constructed of wood, which was commonly used as an insulator. But as we all know wood is also a combustible material and for that reason is no longer permitted near open electrical connections.

Modern consumer unit
A modern consumer unit with RCD’s

Residual Current Devices, (RCD’s). An RCD is an automatic safety device intended to provide extra protection against electric shock. The national safety standard BS7671: 2008 (formerly known as The IEE Wiring Regulations) has for some years required that any socket outlet that may be used to supply portable electrical equipment outdoors, such as lawnmowers or hedge trimmers, to be protected by an RCD with a rated tripping current not exceeding 30mA. Now everything has to be protected by a RCD unless it is mechanically protected

Do-It-Yourself Market. Once again this item crops up as it does under the Rewires heading.

We have seen many examples of poor workmanship carried out by people who have little or no knowledge of the IEE Wiring Regulations and basic electrical safety.

Electrician, Cheadle, Stoke on Trent

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