Consumer Unit Positioning

[plugwash]

any earth rod install MUST be professionally tested

there is not really general method to install rods so they comply it depends so much on soil type groundwater level etc

 

[ban-all-sheds]

Crawlspace - Small area under the floorboards of the ground floor.

I was afraid you meant that.

Plugwash is right - needs to be in soil that gets wet. One should be enough, though

 

[ryanj]

Okay - got the earthing arrangments sorted out.

Now, inside the consumer unit, would it be acceptable to simply use a 100mA type-delay RCD as the main switch, and then treat it as it was a TN supply? ie. 30mA RCBO's on vunerable circuits?

Thanks!

 

[ban-all-sheds]

As long as your definition of "vulnerable" encompasses "all socket circuits", then yes.

 

[plugwash]

all socket cuircuits must be on 30ma rcd on a TT this can be achived with either a split load or rcbos

the 100ma type S rcd needs to be in a plastic enclosure and really should be the very first thing in your install

another thing give your rec a ring they may be able to convert you to PME and save you the hassle

 

[ryanj]

Overhead PME?

And free of charge?

 

[plugwash]

yeah and it avoids the need for that expensive type S rcd

 

[ban-all-sheds]

Take a TT supply, install multiple earth rods along the way, connected to the neutral conductor, and hey presto - PME.

 

[ryanj]

Are power company likely to do this for "me" (every where else on the street/substation is TT) for free?

 

[plugwash]

well seomtimes its free sometimes its about £70 (which is still cheaper than a type S rcd so your still winning) depends on the rec

pme isn't that hard for the rec to do they may have to do some work on the pole and run a new drop to your shouse but thats about the maximum that could be needed

 

[ryanj]

£70 to upgrade a supply.

£300 to move a meter.

Doesn't make much sense. But i've got in touch with my REC, see what they say. If it's possible i'll rewire then get them to upgrade.

 

[daren j]

can you give me sum addvice please [/quote]

 

[ban-all-sheds]

can you give me sum addvice please [/ quote]

Yes

 

[securespark]

But this is a time-limited offer....

 

[ban-all-sheds]

can you give me sum addvice please [/ quote]

No