Hi Everyone,
Note: I live in a part of the UK where there is no Part P.
We have a room that has electric heating (almost) installed.
We have 2 X 1000W electric heaters. A single 1.5mm T&E cable is being run from the CU to the first heater fused switch (fused to 5A). Then, another 1.5mm T&E cable is run from this fused switch to the next fused switch (also 5A fuse) for the second heater. I believe this to be a "Radial" circuit.
It is my understanding that in "free space", the 1.5mm cable used can take up to 20A. In principal, this should be fine for both the heaters (about 8.3A in total for both). However, about 6m of the T&E is under insulation (resting on the ceiling). I believe this to reduce the rating of the cable to 10A. So still ok I believe for the 2 heaters.
However, what MCB should we use in the CU that will protect the cable? Is a 10A MCB still ok, given that it allows overload for a period of time?
Any other tips are appreciated.
Thanks
Note: I live in a part of the UK where there is no Part P.
We have a room that has electric heating (almost) installed.
We have 2 X 1000W electric heaters. A single 1.5mm T&E cable is being run from the CU to the first heater fused switch (fused to 5A). Then, another 1.5mm T&E cable is run from this fused switch to the next fused switch (also 5A fuse) for the second heater. I believe this to be a "Radial" circuit.
It is my understanding that in "free space", the 1.5mm cable used can take up to 20A. In principal, this should be fine for both the heaters (about 8.3A in total for both). However, about 6m of the T&E is under insulation (resting on the ceiling). I believe this to reduce the rating of the cable to 10A. So still ok I believe for the 2 heaters.
However, what MCB should we use in the CU that will protect the cable? Is a 10A MCB still ok, given that it allows overload for a period of time?
Any other tips are appreciated.
Thanks