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This is my first time here so please go easy ?
I am currently designing some circuits for large convenience store and I have a question about the thermal insulation derating factor. A radial circuit will feed two display fridges, total load 10A. The circuit will run from the DB through the roof space on a perferated tray to the back of the shop. It will then be installed inside a 50mm aluminium stud wall with thermal insulation.
My question is, do I de-rate the cable by half as it's running from ceiling to floor level? (in excess of 500mm)
Or
Calculate without Ci and choose ref method 102?
Thanking you in anticipation
I am currently designing some circuits for large convenience store and I have a question about the thermal insulation derating factor. A radial circuit will feed two display fridges, total load 10A. The circuit will run from the DB through the roof space on a perferated tray to the back of the shop. It will then be installed inside a 50mm aluminium stud wall with thermal insulation.
My question is, do I de-rate the cable by half as it's running from ceiling to floor level? (in excess of 500mm)
Or
Calculate without Ci and choose ref method 102?
Thanking you in anticipation