I know...there are probably more topics on this subject than any other. 
And I even went out today and bought the excellent NICEIC "Snags and Solutions" book on "Part 1 : Earthing and Bonding" (below). A very good & useful book IMHO.
But I'm still a little confused; and if I ask 4 electricians the same question, I get 4 different answers.
1) Having recently completed the plumbing for a new bathroom, I know that the cold water feed for the shower, sink and toilet cistern are all supplied by a single 15mm pipe (copper with soldered fittings) into the bathroom...so is it safe to have a single earthing clamp serving these three items? I was planning to add the clamp behind the pedestal for the sink and then link it across to the hot etc. Or do I also have to add clamps to the pipe to the cistern and another for the shower?
2) The hot and cold for the shower is fed from above. The pipes are hidden in a wooden partition wall; the shower side employs plastic panels rather than ceramic tiles. I want to avoid ripping the shower to pieces to add the bonding. The roof of the bathroom has a small access hatch to gain access to the 15mm supply pipework etc and I'd like to add the bonding for hot and cold here --- it is about 70cm above the actual shower. OK to do the bonding here? This access hatch seems to comply with the regs around inspection etc of bonding?
3) I have a very large 1960's cast iron bath; no provision for bonding clamp anywhere....so planning to add (drill and bolt) it to one of the cast iron feet. I assume this is OK?
4) Having bonded all exposed metal parts, I'm not sure where the bonding cable connects to the regular CPC? The various diagrams show a connection to a shaver socket, an overhead light etc. Is it acceptable to take the yellow/green bonding to the nearest CPC --- wherever that may be?
Not a question but a pleasant surprise since I've just bought two; Snag 20 concerns electric towel rails; I was convinced that the rail itself would require bonding but apparently not. The CPC in the flex is sufficient.
Many Thanks
Paul
And I even went out today and bought the excellent NICEIC "Snags and Solutions" book on "Part 1 : Earthing and Bonding" (below). A very good & useful book IMHO.
But I'm still a little confused; and if I ask 4 electricians the same question, I get 4 different answers.
1) Having recently completed the plumbing for a new bathroom, I know that the cold water feed for the shower, sink and toilet cistern are all supplied by a single 15mm pipe (copper with soldered fittings) into the bathroom...so is it safe to have a single earthing clamp serving these three items? I was planning to add the clamp behind the pedestal for the sink and then link it across to the hot etc. Or do I also have to add clamps to the pipe to the cistern and another for the shower?
2) The hot and cold for the shower is fed from above. The pipes are hidden in a wooden partition wall; the shower side employs plastic panels rather than ceramic tiles. I want to avoid ripping the shower to pieces to add the bonding. The roof of the bathroom has a small access hatch to gain access to the 15mm supply pipework etc and I'd like to add the bonding for hot and cold here --- it is about 70cm above the actual shower. OK to do the bonding here? This access hatch seems to comply with the regs around inspection etc of bonding?
3) I have a very large 1960's cast iron bath; no provision for bonding clamp anywhere....so planning to add (drill and bolt) it to one of the cast iron feet. I assume this is OK?
4) Having bonded all exposed metal parts, I'm not sure where the bonding cable connects to the regular CPC? The various diagrams show a connection to a shaver socket, an overhead light etc. Is it acceptable to take the yellow/green bonding to the nearest CPC --- wherever that may be?
Not a question but a pleasant surprise since I've just bought two; Snag 20 concerns electric towel rails; I was convinced that the rail itself would require bonding but apparently not. The CPC in the flex is sufficient.
Many Thanks
Paul
