Recent content by Andy Bradbury

The previous occupier of the building was an engineering company. With lathes and milling machines etc. I am assuming he had all the 3 phase isolators installed at the locations of his machinery. I did find it odd that there was no obvious way to earth them. Using the cable armouring sounds like...

lol. I need an electrician! Anyone in the Reading area? I thought I only need to connect 4 wires that's only 1 more than a 3 pin plug!

It's a plastic isolator. There is no bonding tag. I like the look of those earthing nuts. Looks like it should be straightforward enough. However a after reading the installation manual of my compressor, to avoid damage I need to make sure the motor spins in the right direction. I understand...

Got it. I was looking for a yellow/green wire. I will take your advice and wait the 2 weeks. Just out of interest though how would you connect an earth cable to the armour in the isolator switch?

Sure, I'll post some pics tomorrow. After some googling, and your kind help, I now know enough to know that I don't know what I am doing. I think I'll call a professional. I just did'nt want to wait for 2 weeks for an electrician to come and connect 4 terminals.

Thanks for the quick reply. I thought that would be the case. I have just moved to a commercial building with 3 phase, which is new to me. There are a number if Isolators dotted around the building which is handy. However none of them include an earth. It just seemed odd to me why someone would...

My isolator switches are 3 phase + neutral. My compressor requires 3 phase + PE. Can I use the neutral as a PE?