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decimomal		#1 Posted : 30 July 2012 16:17:38(UTC)
Rank: Super forum user		Can anybody point me in the direction of a Regulation, ACOP etc that specifically states that electrical supplies on construction sites MUST be 110 volts. I have it my mind that is is a requirement but cannot reference it. Many thanks.
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Clark34486		#2 Posted : 30 July 2012 16:27:58(UTC)
Rank: Super forum user		The legislation derives from EAW act and PUWER
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tony.		#3 Posted : 30 July 2012 16:37:01(UTC)
Rank: Forum user		Have a look here. http://www.hse.gov.uk/el...rmation/construction.htm
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decimomal		#4 Posted : 30 July 2012 16:40:58(UTC)
Rank: Super forum user		Thanks Clark / Tony, been there and had a look but cannot find the specific reference I am looking for and I need to be sure I have my facts right.
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Jane Blunt		#5 Posted : 30 July 2012 16:43:12(UTC)
Rank: Super forum user		You can find it in this document: http://www.hse.gov.uk/pubns/priced/hsg150.pdf It is guidance. It is based on the principle that electrocution at a potential difference of 55 V is most unlikely.
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tony.		#6 Posted : 30 July 2012 16:43:50(UTC)
Rank: Forum user		Would you therefor ban my 400 volt pumps, welders. Etc?
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Clark34486		#7 Posted : 30 July 2012 16:46:14(UTC)
Rank: Super forum user		BS7671:2008 704-Construction and demolition site installations
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decimomal		#8 Posted : 30 July 2012 16:51:13(UTC)
Rank: Super forum user		Jane Blunt wrote: You can find it in this document: http://www.hse.gov.uk/pubns/priced/hsg150.pdf It is guidance. It is based on the principle that electrocution at a potential difference of 55 V is most unlikely. Thank you Jane - so it looks as though it is guidance rather than mandatory?
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Jane Blunt		#9 Posted : 30 July 2012 16:56:15(UTC)
Rank: Super forum user		decimomal wrote: Thank you Jane - so it looks as though it is guidance rather than mandatory? Since it is the industry norm, if there were an accident with a 240 V piece of kit I think you would have great difficulty in establishing a defence. Much of 'guidance' is laying out what is perceived to be 'reasonably practicable' and is hence to be ignored at your peril. However, it only remains guidance as there are often ways of achieving the same level of safety using other means.
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decimomal		#10 Posted : 30 July 2012 16:59:11(UTC)
Rank: Super forum user		Thanks again Jane - recieved and understood.
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Zimmy		#11 Posted : 30 July 2012 19:14:27(UTC)
Rank: Super forum user		Extra low (50V or less), Low voltage (230/400V) are allowed on construction sites. Refer to BS7671:(wiring regs under construction sites) Special locations
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Zimmy		#12 Posted : 30 July 2012 19:25:54(UTC)
Rank: Super forum user		reg 704.410.3.10 (II) or thereabouts automatic disconnectio9n and RCD etc. TT or TNS NOT PME/TN-C-S
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Zimmy		#13 Posted : 30 July 2012 19:27:43(UTC)
Rank: Super forum user		Sorry for going on and on but.... RCD's on the low volts suppy side of transformers (230/110 reduced voltage CTE) and NOT on the 110V side.
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