What is the maxium size MCB that can be connected to 1.5mm wire in free space.
Can 10A be used ?
Thanks
If not, what are 10A MCB's used for ?
Can 10A be used ?
Thanks
If not, what are 10A MCB's used for ?
1.5mm max MCB
- Thread starter AndyPRK
- Start date
Sponsored Links
you don't say what 1.5 cable, so we'll assume Twin and Earth.
1.5 will take 20A clipped direct with no other derating factors.
we don't usually use it on anything over a 16A breaker though.
1.5 will take 20A clipped direct with no other derating factors.
we don't usually use it on anything over a 16A breaker though.
It depends on a few more things than just being in "free space"
10A MCBs are generally used for 10 amp circuits.
10A MCBs are generally used for 10 amp circuits.
Andy you could connect a 1.5mm cable no problem, however you need to check what the load capacity of the cable and what is being run on that circuit, you then make the correct selection to ensure protection is correct and neither are overloaded.
Sponsored Links
You've got that all wrong.
You need to do the current carrying capacity calculations before you even think about connecting the cable to the MCB.
You need to do the current carrying capacity calculations before you even think about connecting the cable to the MCB.
yes it is back to front.
1.5mm T&E wire is there with 13A socket & light connected to it.
and I was just wondering what the maximum size mcb it could be connected to, to protect the cable from being overloaded.
while at the same time being able to plug things like a drill or hoover into the scoket with minimum risk of the MCB tripping
1.5mm T&E wire is there with 13A socket & light connected to it.
and I was just wondering what the maximum size mcb it could be connected to, to protect the cable from being overloaded.
while at the same time being able to plug things like a drill or hoover into the scoket with minimum risk of the MCB tripping
loft (only used for maintenance)
and would this be the lighting circuit that you want to use for a plug socket?
Light switches and fittings are usually rated to 10Amps (Small light fittings to 6Amps) but look at them to check. You mustn't put accessories on a circuit fused to more amps than they are rated to.
Light switches and fittings are usually rated to 10Amps (Small light fittings to 6Amps) but look at them to check. You mustn't put accessories on a circuit fused to more amps than they are rated to.
S
sparkyspike
You say the cable is in free space. Is this the case all the way from the loft to the fusebox? And is it all in 1.5mm²?
Not forgetting that volts drop will also have an affect on how much power this cable can safely supply.
the wire length is a very short run. (straight down) 1.5mm all the way
Although against the rules, I was considering putting it on it's own MCB hence the question
Although against the rules, I was considering putting it on it's own MCB hence the question
K
kai
A short length of 1.5.mm cable, say under five metres, can safely carry up to 16amps, provided it's clipped direct to the wall all the way along its run, and the OPD is an MCB or cartridge fuse, NOT a rewireable fuse, and provided the earthing loop resistance is less than the allowable reading.
Maybe he is thinking about volt drop....
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
Sponsored Links
