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I learned this lesson at an early stage of my testing career. I meggered the cable for a particular circuit and all was clear yet I couldn't get the rcbo to stay on. Eventually after a bit of head scratching I tested N to Earth bar. Turned out somebody had burned the cable so bad the neutral was...

A lot of fittings are full of debris. Ie hay etc. Danger of fire from arcing!. ---------- Post Auto-Merged at 13:18 ---------- Previous post was made at 13:15 ---------- Also a lot of cables are at High level, but covered in bird s...! and still accessible to mice etc.

Just out of interest wondered what codes people would give these; All on an agricultural premises. 1. No Rcd protection to any circuits. 300 or 30mA. 2. No mechanical protection to any circuits.(T and E clipped direcr). 3. Accessories not IP rated.

Steptoe I appreciate your knowledge and enjoy learning from people who have more experience than myself. Unfortunately I am one of those who needs to understand how something works. I have put this debate on forums before but you are the first to give a definitive answer that explains the pme/...

Much appreciated.

Steptoe unfortunately I am not as experienced as you and joined this forum for some friendly advice. Which I have been given by the majority. ---------- Post Auto-Merged at 19:13 ---------- Previous post was made at 19:04 ---------- I am still relatively new to the industry and try to do...

Sorry to be a pain but basically you are saying the earth shouldn't be connected to the neutral at the head on farms if its pme. (making it a tncs) and even if it is the tncs should not be exported to other buildinds. Thanks. ---------- Post Auto-Merged at 14:11 ---------- Previous post was...

Please explain. Regs. Say you can't export tnc system. So doesn't this mean tncs aswell. I take it as soon as earth is connected to neutral it changes from pme to tncs. However can you export tncs?. Sorry only been doing electrics 5 years. Still learning every day.

Pme sticker and 16 mm earth coming from neutral in head. Am I getting confused. Isn't a pme the same as tncs anyway. Or does a pme refer to tnc.

Farm is all fed from submain board at house with a pme cut out. All barn DBs are wired in armoureds from this board. Armouring as the earth. Also if each board has 300mA rcds and the neutral does happen to go down I take it the rcd wouldn't trip because wouldn't see difference between L and N...

Can you export pme on a farm if a separate bonding conductor is run with the supply. Done periodic and found pme exported to various barns all of which have extraneous parts. Ie steel structure etc. All DBs were earthed via armouring of supply cable. All had there own earth rod and all bonded to...