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Posted By Richard Davison
I have been asked by my manager to investigate the training/competence required for employees to install and test earth pins on mobile site welfare accomodation.
I am currently struggling to locate relevant material.
Any advice re. this subject or where to find the necessary info would be greatly appreciated.
Many thanks
Richard
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Posted By ian mcnally
Hi Richard,
I am fairly confident that provided it has been installed by a competent electrician in accordance with BS 7671 with a completion and inspection certificate issued the employer will have fulfilled his statutory requirements. Other good specific sources of reference will include HS(R) 25 Memorandum of guidance on the Electricity at Work Regs 1989 HS(G) 85 & HS(G) 141
I am sure an electrical engineer will provide more info.
Good luck
Ian McNally
Ian
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Posted By Ken Taylor
Testing should be carried out following installation in accordance with the IEE On-Site Guide. This requires a competent person (eg electrician) and appropriate test equipment. I would, however, be interested to hear what actually happens in practice.
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Posted By ian mcnally
I can't say what happens on every site but am reasonably confident that on our sites every installation is indeed installed by a competent electrician with a test certificate issued. I would even suspect this would be normal procedure for most of the larger contractors. Different matter when it comes to the earthing or portable generators on site.
Ian
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Posted By Ken Taylor
I'm with you on this, Ian. In my experience, it seems to be the smaller contractors that may 'do their own thing'. The CITB position is to state that effective and tested earthing is needed for generators producing >55v AC and for generator framing to be bonded to the metalwork of the distribution system. The view I once obtained from the HSE Field Consultant Group was also that generators of >5kW should also be protected by a max 100mA RCD at generation and max 30mA at distribution plus equipotential bonding to all exposed metal and conducting parts including the frame - but who sees or attempts to enforce that?!
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