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Student & Learning Zone - City & Guilds
T-NS or TN-C-S service head ?
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<blockquote data-quote="Traineeboy" data-source="post: 509465" data-attributes="member: 32807"><p>Hey chaps just wondered if I could get some clarification. I understand the difference between earthing arrangements. I know TN-S the earth is sheath of the cable and TN-C-S the earth is combined with the Neutral, PEN conductor. </p><p></p><p>Whenever I go on a job I normally know what type of earthing system we are working with. We went to a job the other day where the customer had a new supply put in. The service head states it's a TN-S (SNE) but it looks like a TN-C-S as you connect the earth to service head rather than it coming from a clamp from the sheath of the cable. The property is out in the sticks.</p><p></p><p>It also has a note on it staying DO NOT connect to the earthing terminal ! There for I’m puzzled. Here is a picture of the service head. Peoples thoughts ? </p><p></p><p>[ATTACH]11368[/ATTACH]</p></blockquote><p></p>
[QUOTE="Traineeboy, post: 509465, member: 32807"] Hey chaps just wondered if I could get some clarification. I understand the difference between earthing arrangements. I know TN-S the earth is sheath of the cable and TN-C-S the earth is combined with the Neutral, PEN conductor. Whenever I go on a job I normally know what type of earthing system we are working with. We went to a job the other day where the customer had a new supply put in. The service head states it's a TN-S (SNE) but it looks like a TN-C-S as you connect the earth to service head rather than it coming from a clamp from the sheath of the cable. The property is out in the sticks. It also has a note on it staying DO NOT connect to the earthing terminal ! There for I’m puzzled. Here is a picture of the service head. Peoples thoughts ? [ATTACH]11368._xfImport[/ATTACH] [/QUOTE]
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Student & Learning Zone - City & Guilds
T-NS or TN-C-S service head ?
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