Manufacturers install instructions
- Thread starter nizak
- Start date
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
Instructions are allowed to have stronger requirements than the NEC, however they may not be lesser.
qcroanoke
Sometimes I don't know if I'm the boxer or the bag
- Location
- Roanoke, VA.
- Occupation
- Sorta retired........
Did a lot of UPS's with that requirement for the ground
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
Generally speaking, the more stringent of either applies, so yes, they can.
Kinda like requiring copper where aluminum is otherwise compliant.
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
Sounds like the requirements that hot tub mfg spec for the EGC. I have never installed an EGC same size as the line conductors and never been called on it.
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
Agreed. I don't remember an inspector ever asking to see the installation instructions for anything.
OK. I looked at the installation manual. It looks to me like they copied the section on grounding from their smaller, cord and plug models. They likely didn’t intend to require a full size EGC on this unit. Unfortunately, that doesn’t mean you can ignore it.
Item 2 in the instructions doesn’t allow that. See post 10.
qcroanoke
Sometimes I don't know if I'm the boxer or the bag
- Location
- Roanoke, VA.
- Occupation
- Sorta retired........
Larry I remember one of your first replies to me on my question on wiring a tanning bed was R.T.F.M.
and my reply was if I had T.F.M I would have read T.F.M.Set off quite a few replies from "what does that mean?"
To other variations of it.
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
But you weren't the inspector, right?Larry I remember one of your first replies to me on my question on wiring a tanning bed was R.T.F.M.
Set off quite a few replies from "what does that mean?"
To other variations of it.
qcroanoke
Sometimes I don't know if I'm the boxer or the bag
- Location
- Roanoke, VA.
- Occupation
- Sorta retired........
No. I was in quality control at the time so reading manuals on equipment was one of my tasks.
but I was wiring the tanning bed for a friend.
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
I don't know, makes me think that all of Section 4.2 is in error. I'm in favor of the idea that you can ignore obviously erroneous parts of the manual.
This also raises the question of whether the entire installation manual counts as part of the "listing and labeling" for the purposes of 110.3(B).
Cheers, Wayne
To my reasoning installing a ground wire the same size as line wires ( larger then 10 guage ) is a waste of money. On a short the ground wire only carries current for milliseconds. Like other poster said never been called on reduced ground found in every larger NM cable. Instructions demanding such things are too often written by electronic nerds Who do not know the code.