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breezer said:there is also the henly block but i didn't want to mention it
What is a "henly block"
breezer said:there is also the henly block but i didn't want to mention it
What is a "henly block"
ban-all-sheds said:[code:1]
===10mm²====[JB]====10mm²====[CCU]==={HOB}
||
||10mm²
||
[FCU]------1.5mm²-----{Oven}[/code:1]
That would also give you separate isolation
crystal ball said:What is a "henly block"
It's only got to carry 13A. 1.0mm² would do....mildmanneredjanitor said:Shouldn't that be 2.5mm² after the FCU?
jcdotcom said:and for a bonus - the circuit diagram provided by B-A-S has 10mm2 between the JB and the FCU. If the fcu is fused at 13A, why can't you use 2.5mm2
mildmanneredjanitor said:Because you can't mix cables of a different capacity on the same circuit.
Canny said:Does this work both ways? Is it acceptable for example to replace/alter part of a lighting circuit wired in 1.0mm T&E with 1.5mm T&E? I would have thought using cable above that required wouldn't cause problems but am I missing something here?
plugwash said:why do you need anything special?
garage CUs are just normal ip rated CUs fitted out with a couple of small breakers theres nothing special about them.
thats one of the reasons we have overload protection. If people chance the overload protection without proper information on the cuircuits structure thats not the installers problem.mildmanneredjanitor said:Canny said:Does this work both ways? Is it acceptable for example to replace/alter part of a lighting circuit wired in 1.0mm T&E with 1.5mm T&E? I would have thought using cable above that required wouldn't cause problems but am I missing something here?
No it isn't.
A chain is only as strong as the weakest link...
What if at a later date, you (or someone else) connected an appliance to that cable assuming that it was of the correct rating??? Which it wouldn't of course, as it is connected to a cable of a lower rating.
from a resistance point of view an oversized cable would be just the same as a shorter run of the normal sized cable.mildmanneredjanitor said:I'm sure there are technical reasons against this also... Maybe to do with resistance differences...?
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