Elevator Heater Voltage Drop

[msshel0]

I'm doing an elevator application. Can somebody explain to me what 620.12(A)(2) means? 620.12(A)(1) allows me to parallel small conductors for a lighting load, but I'm trying to run heaters.

Question background: I have heaters on my elevator car. I'm concerned about the voltage drop to those heaters and would like to parallel qty 2 #10's to reduce the drop.

 

[JoeStillman]

620.12(A)(2) is for anything that's not a lighting load - such as a heater. It says #20 minimum, which is much smaller than #10.

Using a 208V heater instead of a 120V one will reduce the current requirement and necessary wire size.

 

[gar]

190809-1045 EDT

msshel0:

Why do you care what the drop is? How large is the load?

.

 

[msshel0]

the load is a 2 kW heater

190809-1045 EDT

msshel0:

Why do you care what the drop is? How large is the load?

.

 

[infinity]

620.20 deals with traveling cables and the traveling cables may only have small conductors in them so when you want to add a larger load like say the heater you are allowed to use parallel conductors to make a set of conductors large enough to handle the load.