The ONLY time de-rating factors can be ignored is when they are not applicable to ANY part of the cable run.
Double check my cable calcs please?
- Thread starter Homer Lawtey
- Start date
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Softus said:
Would you then, for instance, quote ref method 3 for a circuit comprising of 25M of cable clipped direct with a drop in trunking to an accessory being around 1.5M?
Going by your reply I take it you would opt for ref method 3?
ricicle said:
ricicle said:
Fair point which I'll now take onboard.
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Not always.
Softus said:
Standard circuits where I would use a small amount of trunking or conduit.
32A RFC using 2 x 2.5 6242Y
20A radial using 1 x 2.5 6242Y
Method 1 - 27A
Method 3 - 23A
6A Lighting circuit using 1.5 6242Y
Method 1 - 19.5A
Method 3 - 16.5A
I doubt there would be any potential issues on the above circuits should 1.5M of conduit or trunking be used, for example, drops within garages.
Temperature at 30 degrees, no thermal insulation or grouping to take into account.
About the only thing I may be guilty of is putting method 1 instead of method 3 on an EIC.
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