20A mcb or 16A mcb

[Chris_909]

Hi,

Got a 20A mcb radial circuit which used to power a stair lift, I’m going to get rid of that, extend the cable and have one double socket, it’ll power just a lamp and general low current things, should I downgrade it to a 16A or is 20A fine? it’ll be clipped to wall and go through a wall at some point.

 

[ericmark]

No real reason to alter it, just use 2.5 mm² and follow safe routes.

 

[Jurassicspark]

The lights will be protected by the 13A fuse in the plug.

A short circuit will trip the breaker regardless of the rating.

No need to change it.

 

[JohnW2]

No real reason to alter it,

Agreed

just use 2.5 mm² and follow safe routes.

Probably best - but if Method C, 1.5 mm² would actualkly be adequate.

 

[SUNRAY]

The lights will be protected by the fuse in the 13A plug.

A short circuit will trip the breaker regardless of the rating.

No need to change it.

I've corrected it for you

 

[JohnW2]

I've corrected it for you

 

[Jurassicspark]

I've corrected it for you

Don't be so pendatic.

Whether if it's 3A, 5A or even 13A we don't know, I just gave out a random choice for explanation and I knew someone would have pointed it out.

 

[Harry Bloomfield]

Hi,

Got a 20A mcb radial circuit which used to power a stair lift, I’m going to get rid of that, extend the cable and have one double socket, it’ll power just a lamp and general low current things, should I downgrade it to a 16A or is 20A fine? it’ll be clipped to wall and go through a wall at some point.

20A, needing perhaps a 2.5mm or 1.5mm seems quite a lot, for a stair lift - so I would be inclined to double-check the size of the cable, as a first step. I'm thinking - someone might have wired it in 1.0mm and just used a 20amp MCB.

 

[Chris_909]

20A, needing perhaps a 2.5mm or 1.5mm seems quite a lot, for a stair lift - so I would be inclined to double-check the size of the cable, as a first step. I'm thinking - someone might have wired it in 1.0mm and just used a 20amp MCB.

Good thought, but Just checked, they have used 2.5mm cheers