- Joined
- 27 Jan 2008
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- 23,668
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- Llanfair Caereinion, Nr Welshpool
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With extra low voltage we have three classes the SELV must not be earthed, the PELV must be earthed and the FELV can be either earthed or not earthed.
However with low voltage we have Class I must be earthed, and Class II which does not normally have an earth. The question is are you allowed to earth Class II equipment?
It was a rota broach where I had to make that decision am I allowed to earth Class II equipment, the unit was held in place with an electro magnet which was Class I but the hole was drilled with a modified standard drill which was Class II with the markings plainly visible. However since the two units were bolted together as one tool both devices would be earthed if one was earthed.
So two scenarios, either the whole unit is condemned or an earth is used. I fitted an earth but in hind sight not sure this was the correct option. Earthing a Class II device could cause danger or it may not matter, why is there not the P and F versions of Class II?
However with low voltage we have Class I must be earthed, and Class II which does not normally have an earth. The question is are you allowed to earth Class II equipment?
It was a rota broach where I had to make that decision am I allowed to earth Class II equipment, the unit was held in place with an electro magnet which was Class I but the hole was drilled with a modified standard drill which was Class II with the markings plainly visible. However since the two units were bolted together as one tool both devices would be earthed if one was earthed.
So two scenarios, either the whole unit is condemned or an earth is used. I fitted an earth but in hind sight not sure this was the correct option. Earthing a Class II device could cause danger or it may not matter, why is there not the P and F versions of Class II?