msshel0
Member
- Location
- Evansville, IN, USA
We have a customer that has paid us to change out the trailing/traveling cable on an elevator. The original trailing cable and the cable that they have given us are different. The original had 11-14AWG and 22-18AWG wire in it. The new one has 44-18AWG wires. I have a few questions. All of these are in reference to an elevator lighting load using an ETT cable:
1) Is it legal to put 3 wires in parallel, as 2-18AWG's don't make a 14AWG?
2) It appears that the original installer may have put a 14 on a 20 amp circuit breaker. There is no universe where this is compliant, correct?
3) If my cable has 44 conductors (some signal wire, some used for lighting), then I have to derate based on the number of conductors that are used in the lighting circuit, correct?
i.e. if I'm I have 24 signal wires and 20 lighting load wires then I derate by 50% (Table 400.5(A)(3)). So if before I was using 11-14AWG wires I would only have to derate by 50%, but now I have to use 33-18AWG wire to make up, so I would have to derate to the tune of 40%.
1) Is it legal to put 3 wires in parallel, as 2-18AWG's don't make a 14AWG?
2) It appears that the original installer may have put a 14 on a 20 amp circuit breaker. There is no universe where this is compliant, correct?
3) If my cable has 44 conductors (some signal wire, some used for lighting), then I have to derate based on the number of conductors that are used in the lighting circuit, correct?
i.e. if I'm I have 24 signal wires and 20 lighting load wires then I derate by 50% (Table 400.5(A)(3)). So if before I was using 11-14AWG wires I would only have to derate by 50%, but now I have to use 33-18AWG wire to make up, so I would have to derate to the tune of 40%.