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 40A Amp AC 400V Three Poles 3P MCB Miniature Circuit Breaker NEW US $20.08 
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40 Amp Mcb
TRADING DEPOT: TD Line 40 Amp Type B MCB Single Pole Part no: TDMCB40
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Frequently Asked Questions...
what amp fuse should be in main curcuit?
i have electric in my garage 100 amp mcb 16 amp for socets 6amp for lights. i have 4mm armourd cable running 40 meters from the house 100amp mcb. to the garage 100amp mcb have i got my amps right and would i need rcd becouse wire is out side if so what amps
Answer:
The amperage setting is to protect the cable and Buzzbars in the fuseboard and should be rated so.....
2.5mm Twin and Earth Socket Radial: 16Amp
2.5mm Twin And Earth Socket Ring Main: 32Amp
1.0/1.5mm T&E Lighting: 6Amp
4.0mm Steel Wire Armour: 20amp (MUST be earthed at the house)
The 100Amp MCB In the garage should be a RCBO rated at 100/80Amp/30Milliamp earth leakage with its own Earth supplied via an earth stake seperate from the housing earth wired in 16mm Earth Singles
