I think it fair to say that it is common knowledge amongst sparks to direct all live conductors and associated protective conductor through a common aperture in a ferromagnetic enclosure. So I want to direct attention only to domestic installations where load currents will be relatively light so that I can understand better the consequences of not doing so in that particular environment. I refer to regulation 521.5.1 and item 4.17 on the condition report inspection schedule
I have an example of this, tri rated singles through a sheet steel enclosure, each in a stuffing gland through its own hole, not slotted.
its loaded at 400a
the enclosure is about 1.8m tall by 600 wide
I can feel the whole cabinet is slightly warm, it always was, but there is a noticeable temperature rise around the cables in the steel, and the cables are warm where they are passing through the enclosure. Only a few degrees difference.
If I move one of the cables, plenty of slack, I can feel the 50Hz vibration
Its been like that for many years, I suspect the large sheet steel enclosure is a good heat sink
I have an example of this, tri rated singles through a sheet steel enclosure, each in a stuffing gland through its own hole, not slotted.
its loaded at 400a
the enclosure is about 1.8m tall by 600 wide
I can feel the whole cabinet is slightly warm, it always was, but there is a noticeable temperature rise around the cables in the steel, and the cables are warm where they are passing through the enclosure. Only a few degrees difference.
If I move one of the cables, plenty of slack, I can feel the 50Hz vibration
Its been like that for many years, I suspect the large sheet steel enclosure is a good heat sink
