kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
From what I have researched this is true. You don't need expansion couplings, if you worry about anything it is the tree growing outward over the pipe. I installed 3 500 watt halogens at the top of a tree about 6 years ago on my property. This is a very tall tree that moves quite a bit. I used RMC underground and transferred to EMT to go up the tree. I decided to pull a wire EGC in case movement loosened any EMT couplings but I check often and they never have shown any signs of loosening. The bark has begun to encroach the two hole straps I used slightly. But it doesn't worry me a bit. :happyno:
Someday, when the EMT is no longer visible and the tree needs cut down whoever does so will not be happy when they hit that steel tubing with their chain saw.