Bonding DIN Rail
- Thread starter mic
- Start date
- Status
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Re: Bonding DIN Rail
I may be DIM, but what's a DIN?
I may be DIM, but what's a DIN?
- Location
- Massachusetts
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
Re: Bonding DIN Rail
"DIN rail" is a slang term for the mouning track commonly used with terminal blocks and other snap-on mounted devices in control panels.
A better description is 35mm DIN rail, for the most common style that looks like an upside down top hat.
There are actually three types of mounting rail:
DIN 1 - 15mm wide, symmetrical - looks like the old style terminal block mounting strips.
DIN 2 - 32mm wide, asymmetrical - looks like the letter G
DIN 3 - 35mm wide, symmetrical - 7.5mm deep is the most common size although many larger devices need the 15mm depth instead.
DIN rail also comes plated, galvanized, or bare in steel or aluminum and with or without prepunched mounting holes. The most common length is 2m for steel and 1m for aluminum. Some distributors even stock it in 3 and 6" precut lengths.
"DIN rail" is a slang term for the mouning track commonly used with terminal blocks and other snap-on mounted devices in control panels.
A better description is 35mm DIN rail, for the most common style that looks like an upside down top hat.
There are actually three types of mounting rail:
DIN 1 - 15mm wide, symmetrical - looks like the old style terminal block mounting strips.
DIN 2 - 32mm wide, asymmetrical - looks like the letter G
DIN 3 - 35mm wide, symmetrical - 7.5mm deep is the most common size although many larger devices need the 15mm depth instead.
DIN rail also comes plated, galvanized, or bare in steel or aluminum and with or without prepunched mounting holes. The most common length is 2m for steel and 1m for aluminum. Some distributors even stock it in 3 and 6" precut lengths.
- Location
- Massachusetts
Re: Bonding DIN Rail
Check out 300.6(A)
- Location
- Massachusetts
Re: Bonding DIN Rail
Every time
I keep a wire brush that goes on the cordless drill to clean the paint off before I land a foot lug for EGC connections.
After bolting the lug in place once in a while I hit the area with gray primer but certainly not every time.
Every time
I keep a wire brush that goes on the cordless drill to clean the paint off before I land a foot lug for EGC connections.
After bolting the lug in place once in a while I hit the area with gray primer but certainly not every time.
Re: Bonding DIN Rail
so you do it my way, iwire.
outside on the govt place i work, we use cold galvanized on the ends of strut, and conduit threads. inside we do nothing. we only repaint a panel when it really looks old ugly and dingy. and that is not for protection, it is for appearance.
so you do it my way, iwire.
outside on the govt place i work, we use cold galvanized on the ends of strut, and conduit threads. inside we do nothing. we only repaint a panel when it really looks old ugly and dingy. and that is not for protection, it is for appearance.
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
Re: Bonding DIN Rail
I seem to recall the steel DIN rails can be used for PE function but not the AL ones.
I didn't know they made them zinc plated. I have only seem them chrome plated.
I seem to recall the steel DIN rails can be used for PE function but not the AL ones.
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
Re: Bonding DIN Rail
I think the correct term is zinc-bichromate not just zinc or chrome.
I think the correct term is zinc-bichromate not just zinc or chrome.
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
Re: Bonding DIN Rail
I'd be really impressed to see someone remove a KO but leave the paint!
Depends on how talented you are, how well the KO was punched, and how strong the metal is.
I'd be really impressed to see someone remove a KO but leave the paint!
Re: Bonding DIN Rail
Petersonra wrote
"I seem to recall the steel DIN rails can be used for PE function but not the AL ones."
As I understand it, aluminium is liable to surface corrosion which would lead to contact resistance.
If anyone can provide more detailed information I would be very grateful.
Nigel Moore
Japan
Petersonra wrote
"I seem to recall the steel DIN rails can be used for PE function but not the AL ones."
As I understand it, aluminium is liable to surface corrosion which would lead to contact resistance.
If anyone can provide more detailed information I would be very grateful.
Nigel Moore
Japan
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: Bonding DIN Rail
" If anyone can provide more detailed information I would be very grateful."
I've never seen any specifications on this. DIN rail is a recognized, not listed product. UL 508 is likely to say maintain an effective ground fault current path.
I would contact a DIN rail manufacturer, such as Phoenix or Allen Bradley.
All the listed control panels I have worked in install the DIN rail with a pan head machine screw.
The terminal blocks typically are used with small wires and low ampacity circuits.
The solution is simple. The grounding terminal blocks mechnically clamp onto the rail. Run a wire from a grounding terminal block and terminate it to a properly intstalled bonding point.
" If anyone can provide more detailed information I would be very grateful."
I've never seen any specifications on this. DIN rail is a recognized, not listed product. UL 508 is likely to say maintain an effective ground fault current path.
I would contact a DIN rail manufacturer, such as Phoenix or Allen Bradley.
All the listed control panels I have worked in install the DIN rail with a pan head machine screw.
The terminal blocks typically are used with small wires and low ampacity circuits.
The solution is simple. The grounding terminal blocks mechnically clamp onto the rail. Run a wire from a grounding terminal block and terminate it to a properly intstalled bonding point.
- Status