Armoured cable 16mm or 25mm

[Cliff C]

I am not an electrician. Can anyone help please?

I have an outbuilding which I am converting into two offices.

The building is currently served by a 16mm armoured cable running underground from my house, the distance is about 100 metres.

Potentially the building could have a maximum of the following appliances:-

2x2kw electric oil filled radiators
1x1.5kw electric oil filled radiator
Hand wash 2.5kw
Electric Kettle 2.5kw
Saniflo 400 watts
Vacuum Cleaner 1kw
4 Fluorescent Lights
2 Computers
Total aprox 13kw

Will the existing 16mm cable be adequate or will I have to have it replaced with a 25mm armoured cable.

Thank you

 

[ChrisElectrical88]

If you are using the office for yourself and are concious on what you are using together then the 16mm on a 25A MCB should be ok. Must be a big shed for that many heaters?

I would go with the upgrade however and get a fully detailed quote before placing the order.

 

[ChrisElectrical88]

Deleted duplicate

 

[Strima]

I would be using a fuse at source otherwise it could be a long walk when something trips out.

 

[UKPN]

I am not an electrician. Can any

You're obviously in possession of warm clothing.
I get 23.91 Amperes with just the heaters on full balls.

i could not be arsed to work out the VD as books are in van. however, for wtat it would cost to replace the 16mm cable versus exceeding the 3% for lighting, I'd fit LED lights which are happy with a slightly reduced voltage and sod it. at the end if the day, it's only a shed, not a hospital operating theatre. tin hat ready.

one help please?

I have an outbuilding which I am converting into two offices.

The building is currently served by a 16mm armoured cable running underground from my house, the distance is about 100 metres.

Potentially the building could have a maximum of the following appliances:-

2x2kw electric oil filled radiators
1x1.5kw electric oil filled radiator
Hand wash 2.5kw
Electric Kettle 2.5kw
Saniflo 400 watts
Vacuum Cleaner 1kw
4 Fluorescent Lights
2 Computers
Total aprox 13kw

Will the existing 16mm cable be adequate or will I have to have it replaced with a 25mm armoured cable.

Thank you

 

[UKPN]

25sqmm, then you can sleep at night.

 

[Yr ys]

Just change to led and use the 16mm cable. No worries.

 

[DPG]

Just change to led and use the 16mm cable. No worries.

LED heaters?

 

[Pete999]

You're obviously in possession of warm clothing.
I get 23.91 Amperes with just the heaters on full balls.

That's a testing course aint it, 2391 I mean?