bs no. of main supply fuse (attached pic)

[dtec dave]

Does anyone know the bs no of the fuse on the attached pic and how do I find out the earthing arrangment without taking the cover off?

 

[lauriehurman]

Hi Dave
Very clever trick that someone on here pointed out;
Measure Ze then measure loop impedance between line and neutral. If they are the same then it's an earthed neutral, if there is a difference then they are seperate.

Hope that helps
Laurie

 

[BillyTheSparks]

That Terminal block for the earths joins into the neutral. So that makes it PME TNC-S. The fuse is probably a BS1361 or a BS88. No real way of knowing (that I know of) which it is until it is removed and looked at.
I see that the seal has already dropped on the floor......so I would remove it and look......just to make sure.

 

[funkymonkeytwo]

I'm with billy it's a pme earthing arrangement take the fuse out undo 2 screws and read the cartridge I'd say bs88

 

[dtec dave]

Thanx..The ze tests i did would suggest it was TNCS..I'll need to go back to check the fuse.