Heating Wiring Centre

[ericmark]

530.3.4 For an installation with a 230 V single-phase supply rated up to 100A that is under the control of ordinary persons. Switchgear and controlgear assemblies shall either comply with BS EN 60439-3 and Regulation 432.1 or be a consumer unit incorporating components and protective devices specified by the manufacturer complying with BS EN 60439-3, including the conditional short-circuit test described in Annex ZA of BS EN 60439-3.

This in essence excludes the use of non standard distribution units or wiring centres. I can't find the regulation in BS7671:2001 so it does depend when the installation was designed. Seem to remember 2001 we had skilled and competent, but 2008 competent was combined with skilled.

The use of type tested equipment was not required when I was an apprentice and I don't really know when this came in, since I was mainly working in house commercial the limitations for equipment for use by ordinary persons was not some thing I had to worry about.

In domestic traditionally there has been a lack of labels, including lack of over sleeving where colours are not correct, including using green/yellow wires for other than earth. This is unfortunately often found with central heating, where I have seen thermostats installed without an earth wire being available. Although you can have class II equipment without need for an earth, for non portable i.e. installed equipment the earth must be there even if not connected.

But I would say an electrician was being rather pedantic if he wanted to rewire the central heating because of some historical wiring, which may not be required if designed before the cut off date.

 

[ianmcd]

So basically, YOU ONLY DEAL WITH ELECTRICAL ISSUES ON HEATING SYSTEMS? Unlike me..

yes and i have forgotten more than you will ever know about heating system wiring