TNCS PME on caravan site with static caravan EICR

[fatgreeny09]

they are not a house ,but a static caravan and can be up lifted not like house permeant.

So 717 mobile or transportable unit..... no ?

 

[KEV 1 N]

They are type 4 Federal Electric devices and you need manufacturers data to compare Zs values. Sounds like you are out of your depth on this.

I’ve came across this type of DB before, and it had some newer mcbs fitted along the old ones, but they had to cut the lid of the DB to make them fit, unless they’ve put the wrong ones in and bodged it...

 

[westward10]

So 717 mobile or transportable unit..... no ?

What do you think.

 

[fatgreeny09]

What do you think.

Well that's a very helpful answer. However I think it is a transportable unit and not a caravan. What do you think ?

 

[westward10]

717 or 721 are you not still in the same boat, or should I say caravan as the requirements regarding TN-C-S apply in both cases.

 

[Octopus]

What do you think ?

I would have looked at the site to get an idea of what is going on and almost certainly declined the work!

 

[Percyprod]

Static, mobile, shed, non can be pme'd.

 

[Ian1981]

Static, mobile, shed, non can be pme'd.

Why can’t a shed housing Electrical equipment/accessories not be part of TN-c-s earthing.
Care to share your reasoning?

 

[Percyprod]

Not a permanent building

 

[westward10]

Not a permanent building

Is any building

 

[Ian1981]

A well argued answer

 

[buzzlightyear]

made for the trailer trash ,got a tow bar ,has a house !

 

[Sparkingmad]

I have worked extensively in the static caravan park world. The only acceptable earthing arrangements for such buildings is TNS or TT.
TNCS can be used for supply upto external plastic meter box. Unit itself must be connected to earth rod and fed via 30mA RCD. I have also worked on units with SEB TNCS supplies housed in external meter cupboards. We never used the company earth and always fitted earth rods usually one was enough but quite often would fit 2 1 at each end of the concrete base and always tested the metal chassis and side walls to the earth connection.