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Do-It-Yourself (DIY) Question & Answer Forum
what type of earthing system is this?
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<blockquote data-quote="batty" data-source="post: 26180" data-attributes="member: 66"><p>In my area the options of earthing are</p><p></p><p>TNS two cores in cable four for three phase earth comes of armour of lead cable.</p><p></p><p>TT two cores coming into property overhead generally these could be pme as earth is combined with neutral at cut out.</p><p></p><p>TNCS usually single or three core cable with armouring being used as neutral and combined earth.</p><p></p><p>I have never seen a TNS system on overhead in my area.</p><p></p><p>As for my thoughts on pme. I think it is safer than TT . I have been to two jobs recently where earth has been bad due to faulty connection at rod. If property is on plastic water main the rod is going to be your only earth so if it gets disconnected how is owner going to know. Its what electric boards provide due to cost of cable so we have to make do with this. I am not for or against it.</p><p></p><p>batty</p></blockquote><p></p>
[QUOTE="batty, post: 26180, member: 66"] In my area the options of earthing are TNS two cores in cable four for three phase earth comes of armour of lead cable. TT two cores coming into property overhead generally these could be pme as earth is combined with neutral at cut out. TNCS usually single or three core cable with armouring being used as neutral and combined earth. I have never seen a TNS system on overhead in my area. As for my thoughts on pme. I think it is safer than TT . I have been to two jobs recently where earth has been bad due to faulty connection at rod. If property is on plastic water main the rod is going to be your only earth so if it gets disconnected how is owner going to know. Its what electric boards provide due to cost of cable so we have to make do with this. I am not for or against it. batty [/QUOTE]
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what type of earthing system is this?
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