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Hi All,
Just looking for some advice: I'm in the process of updating an old cable calc spreadsheet that helps to spit out Zs and Voltage Drop figures but I'm just looking for some clarity on figures.
For 3-core 16mmsq SWA, single phase, I'm looking at table 4D4B in BS7671 and it states:
What would the correct value be in the context of the above cable?
Also for Zs and calculating R1+R2 for same, the on-site guide says in table I1 that for 16mmsq, copper conductor R/m is 2.3 Ohms. For ducted cable, should this be multiplied by 1.2 (Table I3), to give value of 2.76 Ohms?
Any guidance is much appreciated.
Just looking for some advice: I'm in the process of updating an old cable calc spreadsheet that helps to spit out Zs and Voltage Drop figures but I'm just looking for some clarity on figures.
For 3-core 16mmsq SWA, single phase, I'm looking at table 4D4B in BS7671 and it states:
- Two-core cable, single-phase AC - 2.8 mV/A/m
- Three or four-core cable, three-phase AC - 2.4 mW/A/m
What would the correct value be in the context of the above cable?
Also for Zs and calculating R1+R2 for same, the on-site guide says in table I1 that for 16mmsq, copper conductor R/m is 2.3 Ohms. For ducted cable, should this be multiplied by 1.2 (Table I3), to give value of 2.76 Ohms?
Any guidance is much appreciated.