UL508A grounding conductor

[soz yitimi]

Hi everbody,

I have a simple question for you. I'm desgining a electrical cabin for North America. It will remote a simple pump. I just wondered about ground wires. I mean all of wires prefred UL LISTED mark on them except ground wires.


My question is;

Is it necessary to use UL LISTED mark grounding wires for North America?

Beacuse UL Inspector will check it in USA, I did not want to do a miss job.

Many thanks for your help.

 

[Jraef]

Something is getting a little lost in translation here. What do you mean by "electrical cabin"? To us, a cabin is a place to sleep in by the lake in the summer. Did you maybe mean a "cabinet", as in a control panel?

Also, what exactly do you mean by "grounding wires"? There are several applications to consider; the wire that connects a service to a grounding electrode (ground rod) is called a Grounding Electrode Conductor (GEC) and that can be bare copper wire, no insulation. A "ground wire" that connects a piece of equipment to a grounded connection is called an Electrical Grounding Conductor (EGC) and is typically done with green insulated wire. UL listing of wires only has to do with insulation ratings and flammability. Depending on what "grounding wires" means in your situation, they may not need to be insulated at all. But if you use insulated (i.e. green) wires for EGCs, then they must be insulated the same as the highest voltage level in the system, which means UL rated conductors.

 

[petersonra]

What the last poster said.

Why would a UL inspector be looking at whatever you are building when it gets here? If you are going for a field evaluation instead of having it built by a UL508a panel builder you will be paying through the nose for it. There are almost certainly UL508a panel builders in Turkey that you could have build the panel for you and apply the UL sticker and then you would not need to have anyone look at it after it is installed since it would already have the sticker.

 

[soz yitimi]

Thanks a ton for your help!

Something is getting a little lost in translation here. What do you mean by "electrical cabin"? To us, a cabin is a place to sleep in by the lake in the summer. Did you maybe mean a "cabinet", as in a control panel?

Right, it was a quick post and thanks for correction. Yes, I mean an electrical cabinet which is included some fuses conactors, terminal blocks wires etc

Also, what exactly do you mean by "grounding wires"? There are several applications to consider; the wire that connects a service to a grounding electrode (ground rod) is called a Grounding Electrode Conductor (GEC) and that can be bare copper wire, no insulation.

I have asked exactly about EGC.

UL listing of wires only has to do with insulation ratings and flammability. Depending on what "grounding wires" means in your situation, they may not need to be insulated at all. But if you use insulated (i.e. green) wires for EGCs, then they must be insulated the same as the highest voltage level in the system, which means UL rated conductors.

This is key point of my questions. If I understand clearly I have to use same EGC like other power wires in the electrical cabinet. Isn't it?

Many thanks dear Jraef

 

[soz yitimi]

What the last poster said.

Why would a UL inspector be looking at whatever you are building when it gets here? If you are going for a field evaluation instead of having it built by a UL508a panel builder you will be paying through the nose for it. There are almost certainly UL508a panel builders in Turkey that you could have build the panel for you and apply the UL sticker and then you would not need to have anyone look at it after it is installed since it would already have the sticker.

Thanks Peter,

Actually it is so simple to do this inpection in Turkey but we can not do this beacuse of trade rules. I mean the deal is just covered to do inspection in USA. That'ss why I plan to do a perefect job to avoid travel to USA just for a couple wires.

 

[petersonra]

Thanks Peter,

Actually it is so simple to do this inpection in Turkey but we can not do this beacuse of trade rules. I mean the deal is just covered to do inspection in USA. That'ss why I plan to do a perefect job to avoid travel to USA just for a couple wires.

The thing is that if you are unfamiliar with UL508a, there are a lot of things that can create havoc for you.

 

[Jraef]

The thing is that if you are unfamiliar with UL508a, there are a lot of things that can create havoc for you.

He's right about that...

So are you sending this panel here and then having UL do a field inspection? Or are you (incorrectly) assuming that this takes place automatically when it arrives? What actually happens is that when your machine gets installed, a local inspector may look for a UL label on the entire control panel ASSEMBLY, not just whether or not it was built to UL specs. If it is not there, then your only choices will be to send the panel to a UL 508A panel shop to be inspected, altered (if necessary) and listed by them, or to call UL for a field inspection, which is the ABSOLUTE most expensive way to do this.