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Shepherds hut
Former Community Member
I’ve been asked to do an Eicr on a shepherds hut and the supply to it, only had a quick look. The supply is from a farmhouse tncs earthing arrangement to a commando socket. The hut is all wood except chassis which is steel. I think it would probably fall within the definition of caravan for bs7671 so with the tncs would not meet the regs. However since the thing is entirely wood except for the chassis is there an argument for a c3 code?
If the whole structure is made of wood who cares what the chassis is made of? Just leave the chassis electrically separate from all electrical connections including bonding and it is safe. The concerns about caravans or metal mobile units is that they are mainly all metal so a connection can be made to the conducting metal caravan/mobile unit walls or door frame and Earth by people whilst entering or leaving the thing. That is why a P.M.E. supply may be dangerous as a bonded metal caravan may be at a potential above true Earth.
705.411.4 A TN-C system shall not be used. Therefore, C2.
But Chris, this thing is not a "fixed electrical installation", it's movable as it has wheels, so falls without section 705. "Rooms, locations and areas for household applications and similar are not covered by this section." Please see 705.1.
So Scooby, as I understand it the shepherd's hut is a wooden shed on a metal chassis on a concrete base,and it has rubber tyres. Is it situated in a garden area, a yard or in a field? Are there animals on this farm or is it purely crop based. What is the shepherd's hut used for, purely domestic use like an office or summer house, or does it house animals?
705.411.4 A TN-C system shall not be used. Therefore, C2.
But Chris, this thing is not a "fixed electrical installation", it's movable as it has wheels, so falls without section 705. "Rooms, locations and areas for household applications and similar are not covered by this section." Please see 705.1.
705.411.4 A TN-C system shall not be used. Therefore, C2.
But Chris, this thing is not a "fixed electrical installation", it's movable as it has wheels, so falls without section 705. "Rooms, locations and areas for household applications and similar are not covered by this section." Please see 705.1.
Is the installation not fixed to the hut?
We have not been told what the installation specifically comprises Chris. I still suggest that 705 does not apply to this hut as it comes under 705.1, "Rooms, locations and areas for household applications and similar are not covered by this section."
Highly unlikely it's a TN-C system - more likely TN-C-S - which isn't the same and so not prohibited. (BS 7671 does allow TN-C systems generally (under prescribed circumstances) - see section 543.4).
