Welcome Guest! The IOSH forums are a free resource to both members and non-members. Login or register to use them

Postings made by forum users are personal opinions. IOSH is not responsible for the content or accuracy of any of the information contained in forum postings. Please carefully consider any advice you receive.

Notification

Icon
Error

Options
Go to last post Go to first unread
Admin  
#1 Posted : 10 January 2007 10:11:00(UTC)
Rank: Guest
Admin

Posted By NeilTonge I am looking for a steer on the requirements to fit local electrical isolation to motors. Three of our electrical engineers are convinced that there is a requirement in the 16th Edition wiring regulations to have a local isolator fitted within one metre of a motor. A further electrical engineer disputes this and I have been asked to mediate. Having reviewed the wiring regulations all I can find is that there is a requirement to have lockable isolation for every motor. This would make sense to me as it ensures safety during maintenance when coupled with our isolation procedures and training. However for convenience of maintenance it may be wise to fit local isolation to groups of motors as a minimum. In our example this could happen in an electrical panel 3 mtrs away which seems safe to me. Can anyone quote the section of the wiring regulations my three engineers remember which requires local isolation within a mtr as they can't and I can't find it? Thanks, Neil
Admin  
#2 Posted : 10 January 2007 15:52:00(UTC)
Rank: Guest
Admin

Posted By Adam Worth My colleague and I (experienced process safety practitioners) have not know this to be the case. This may however be as we deal with Chemical plants where EX equipment must be used. As we do not know of any EX isolators we rely on the isolators located in the switch room. You do not say what type of pump you are dealing with, and I assume the regs may be different for utility pumps If you find that the isolation within one-meter rule is the case, please let me know, Obviously in respect to isolation of these pumps we implement Lock, Tag and Try. Try being effected at the local stop start My colleague has seen Ex equivalent local isolators with lock off in the American chemical industry I hope this helps
Admin  
#3 Posted : 11 January 2007 12:37:00(UTC)
Rank: Guest
Admin

Posted By Frank Hi Neil FYI BS 7671 2001 rule 131-14-02 states the following: Every fixed electric motor shall be provided with an efficient means of switching off, readily accessible, easily operated and so placed as to prevent danger In theory Engineers want them as close as possible but common sense should prevail and if the 1 Metre rule they want can’t be met then normally it’s within sight of and you are still within the rules as above as long as the Isolator clearly states the Drive Number of the equipment it is Isolating then there will not be a problem. Hope this helps I know what engineers can be like I work with them all the time. Any problems drop me a line Frank
Admin  
#4 Posted : 11 January 2007 12:53:00(UTC)
Rank: Guest
Admin

Posted By I McDonald Hi Neil I would think this will depend on what the engineers are doing (without sounding stupid). Are they designing an electrical installation? If "YES" it may be detailed in an EN standard or be a requirement identified when complying with the EHSR's under the Machinery Directive. Bit more specific detail may assist in a clear answer. Regards Ian
Users browsing this topic
Guest
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.