- Location
- New Jersey
- Occupation
- Journeyman Electrician
I have a situation where I need to find the distance of 7 runs of MC cable from a low voltage transformer to 7 LV lighting tracks. The tracks are about 10' apart so each set of LV conductors from the transformer are about 10' longer than the next. This makes the longest run about 60' longer than the shortest. The engineer thinks that this will create a problem because the lighting level at the farthest track will be dim compared to the level of the closest due to voltage drop. By making all of the circuits the same length the varying light output from track to track will be eliminated.
Question is what is the simplest way to test each individual cable run to find their respective lengths? Someone suggested splicing the two conductors on one end of the cable together and measuring the resistance on the other end with a DMM. Then you could compare the readings and find each cable length. Will that actually work? Or is there a better method? The goal here is to add cable to the shortest runs so that they're all approximately the same length. The cables are already in place. Thoughts?
Question is what is the simplest way to test each individual cable run to find their respective lengths? Someone suggested splicing the two conductors on one end of the cable together and measuring the resistance on the other end with a DMM. Then you could compare the readings and find each cable length. Will that actually work? Or is there a better method? The goal here is to add cable to the shortest runs so that they're all approximately the same length. The cables are already in place. Thoughts?