The runs were in PVC and I was comfortable not pulling a ground, but having the GEC originate at the gear, but I had an employee question me on it after we pulled the runs and I thought about it until my head spun. I told him all the reasons we didn't need one, but there is always that little unsettling feeling in the back of your mind. I told him next time if he has a question on how we are doing something to ask before the work is done, next time he could be right. Thanks for the help. I'll sleep better tonight.
Ground from Transformer to gear.
- Thread starter LazyS
- Start date
- Status
- Location
- Massachusetts
Let me say I am no fan at all of using RMC as a neutral conductor:smile: but that said what is the real problem?
Lets say you did have metal raceway between the power company transformer and the service disconnecting means with it bonded at each end so the raceway is now in parallel with the neutral
Can you describe how it could affect PQ inside the building?
I can't see how it would.
brian john
Senior Member
- Location
- Leesburg, VA
RMC* is not an issue, BUT cable tray, busway or metal trough can be and is used quite often around here.
* And I am not a fan of any current on a EGC.
* And I am not a fan of any current on a EGC.
Just to complicate things what type of bonding if any do you do on a splice box? Say you run your service conductors from a padmount POCO supplied transformer to a splice box then into your switchgear. Do you have to bond the splice box and if so what purpose does bonding it achieve?
- Location
- Massachusetts
Neither am I but I just don't see it as a PQ issue even with cable tray, busway or metal trough.
What are the detrimental effects of current flowing on the service raceways other then bothering us personally? (my question assumes a true neutral conductor is in place and terminated properly)
Yes, if it's a metallic box it must be bonded and if it's ahead of the service equipment it can be bonded to the neutral.
Roger
- Status