Discuss Advice needed! Ive been to see a job for garage power, the previous electrician has taken a 4mm on a 32amp B MCB protected by a 30mA RCD. But hasnt do in the Electrical Forum area at ElectriciansForums.net

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Sparkzilla

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Advice needed! Ive been to see a job for garage power, the previous electrician has taken a 4mm on a 32amp B MCB protected by a 30mA RCD. But hasnt done anything with, apart from the fact there is no protection and its T&E all straight forward. My ownly question is do i gland straight into a socket and then have a fuse spur to supply a light OR can i install a 2 way board protected by a main switch or does it need to be a RCD main switch.
 
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Pete999

Pete999

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Advice needed! Ive been to see a job for garage power, the previous electrician has taken a 4mm on a 32amp B MCB protected by a 30mA RCD. But hasnt done anything with, apart from the fact there is no protection and its T&E all straight forward. My ownly question is do i gland straight into a socket and then have a fuse spur to supply a light OR can i install a 2 way board protected by a main switch or does it need to be a RCD main switch.
Why didn't the original Sparky finish the job???
 
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Sparkzilla

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  • #5
Why didn't the original Sparky finish the job???
Your guess is as good as mine, customer said that he had said he was too busy.. i say the term electrician loosey, kitchen fitter with part p
 
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Sparkzilla

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  • #7
How has the 4mm cable been installed.
Take through the ceiling of the ground floor, drilled out and slung in free air to the garage, my plan is to take it back to the house come down in 25mm conduit, dig a trench terminate aromoured, to either a 2 way board or socket.
 
davesparks

davesparks

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Advice needed! Ive been to see a job for garage power, the previous electrician has taken a 4mm on a 32amp B MCB protected by a 30mA RCD. But hasnt done anything with, apart from the fact there is no protection and its T&E all straight forward. My ownly question is do i gland straight into a socket and then have a fuse spur to supply a light OR can i install a 2 way board protected by a main switch or does it need to be a RCD main switch.
What do you meant by no protection?
What protection do you think a main switch will provide?
Do you understand what an RCD is, how it works, and how it will work if you install another one in series with the existing one?
 
westward10

westward10

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As soon as you contain it you can no longer use a 32A protective device. I would pull back into the house then use swa from this point.
 
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drilltoaster

Advice needed! Ive been to see a job for garage power, the previous electrician has taken a 4mm on a 32amp B MCB protected by a 30mA RCD. But hasnt done anything with, apart from the fact there is no protection and its T&E all straight forward. My ownly question is do i gland straight into a socket and then have a fuse spur to supply a light OR can i install a 2 way board protected by a main switch or does it need to be a RCD main switch.
i would where it comes through the brickwork on house straight into ipbox sealed to allow swa via a cantenary wire with metal zips into either a small consumer unit dont forget to check whether you need to slam a rod in as tt for external outbuildings, you wont need rcd board in here if its already protected at source due to which trips first,
 
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