PME ze high?

[welsh_dude_6]

hi guys, during installing a new ring main today during testing ze i recieved a high reading of 32 ohms on a pme system.i know thi is high. should i inform the suppliers? or is that down to us sparkies? my zs readying are slightly higher by a 0. sumthing. if i need to infor this on certificate where do i put it? it is rcd protected and 32a mcd type b. any help appriciated. cheers

 

[i=p/u]

hold to be advised further, hold to be advised further, hold to be advised further.. id say it is a tt converted.. but something has happened

 

[Rockingit]

Do you mean 32 or .32? If the latter, then it complies.

 

[welsh_dude_6]

32.0 is what im getting, it very high as it should b 0.8?

 

[Dan23584]

You should ring the DNO.

 

[Dan23584]

It should be 0.35 for a PME.

 

[Dan23584]

0.8 is for a TN-S

 

[Rockingit]

0.8 if TN-S
0.35 if TN-C-S

In the practical sense, it doesn't really matter to you if your installation is RCD protected as that gets you the other side of 1600 ohms and still complying with regs, but it's not right and you should flag it with the DNO. However, be prepared for them to not be that interested and tell you to make it a TT.

 

[welsh_dude_6]

lol theyll say anythig so they dun have to do it.

 

[Engineer54]

If this 32 ohm reading is correct, I think they will be rather more conserned than you think, if this is PME supplied system!! ....Something is braking down on the neutral of this DNO supply, and probably at the tee off joint for the property!!!

 

[MarkieSparkie]

lol theyll say anythig so they dun have to do it.

I think you are wrong, the DNO are likely to treat this as a priority emergency call out, because the property you are working in may not be the only one in the area effected by this fault.

 

[jenions]

quality and continuity regs says somewhere that the DNO is responsible for the up keep of their pme's so ring them, western power come out as an ememrgency round here