I want to scream

[petersonra]

Long chat with the tech support guy at a name brand automation company this morning.

Long and short of it is a customer bought a switch rated for div 2 that ended up being installed in a div 1 area. Not a big deal, just add an IS barrier - right?

Tech support suggested a part number to customer for IS barrier. I look for wiring diagram. The only documentation they have shows it hooked to a Namur sensor, and nothing in the document says you can hook it to dry contacts.

Tech support says Namur is considered a simple device so you can use barrier with any simple device. I say - where does it say that in the manufacturers documentation. Tech support says - you can google simple device. I say - google is not manufacturer.

Am I being too an^l about the control drawing requirement?

 

[barbeer]

Am I being too an^l about the control drawing requirement?

IMHO I believe your adjective is socially acceptable these days, what with mainstream OCD's and all! Be proud of your perfectionism.

 

[augie47]

I may be proven wrong, but I would think if it's listed and labeled for Div II, nothing you do (other than a field UL {NRTL} inspection) is going to change that and thus it would remain unacceptble.

 

[petersonra]

I may be proven wrong, but I would think if it's listed and labeled for Div II, nothing you do (other than a field UL {NRTL} inspection) is going to change that and thus it would remain unacceptble.

Thats why I found a substitute part that actually came with documentation that showed it worked with namur and dry contacts. My suspicion is that they just forgot to show it on the drawing.

 

[weressl]

I may be proven wrong, but I would think if it's listed and labeled for Div II, nothing you do (other than a field UL {NRTL} inspection) is going to change that and thus it would remain unacceptble.

If it is a simple mechanical switch then the addition of an IS barrier would make it acceptable in a Division 1 location. Of course the device itself wouldn't had to have a Division 2 rating, it could have been an ordinary device.

If it is an electronic 'switch' as in inductive 'limit switch' the whole game changes.

 

[petersonra]

If it is a simple mechanical switch then the addition of an IS barrier would make it acceptable in a Division 1 location. Of course the device itself wouldn't had to have a Division 2 rating, it could have been an ordinary device.

If it is an electronic 'switch' as in inductive 'limit switch' the whole game changes.

I am not sure how they cam to pick the switch. My guess is someone decided they needed an XP switch and they went and ordered one, not realizing the non-obvious intricacies of the situation.