Divisions

[tryinghard]

Were are Divisions defined in Chapter 5?

 

[Rockyd]

500.5.....

 

[tryinghard]

500.5.....

Okay so there are only 2 divisions total, 2 for each Class I, II, or III. I was wondering if "division" had it's own definition.

 

[Goroon]

Divisions ? Boundrys

Divisions ? Boundrys

There are three, or better to think of them as Boundrys.

CL X, Div1 Hazard Present...
CL X, Div 2, Hazard May Be Present
Then the boundry line to No Hazzard present.

Each Boundry requires seals and has Special requirements associated with wiring requirements.

I use 5 of the NFPA books described in 500.4(B) needed to define those Boundrys.

 

[Pierre C Belarge]

To be specific, the divisions are different for the different hazardous locations, as per 500.5(B)(1)-(2), (C)(1)-(2) and (D)(1)-(2)

 

[tryinghard]

Okay I see this. I also notice when purchasing condulets as example the are C1 group C and such. They don't referance divisions, I know the groups matter but when purchasing C1 group C for example I assume its good for gasoline areas?

 

[rbalex]

All references are 2008 NEC unless otherwise noted.

Okay I see this. I also notice when purchasing condulets as example the are C1 group C and such. They don't referance divisions, I know the groups matter but when purchasing C1 group C for example I assume its good for gasoline areas?

You are now wandering over to Section 500.8 which sets up the basic philosophy that equipment must be suitable for a location?s Class, Division, Group and Temperature Classification. Note the entire new Subsection 500.8(A) on ?Suitability.?

... They don't referance divisions?

They aren?t required to reference Divisions. See 500.8(B)(2) and 500.8(C)(2).

? when purchasing C1 group C for example I assume its good for gasoline areas?

Theoretically, NO; since gasoline is a Group D material and the equipment should be so marked. See 500.8(C)(3). However, since the 1999 NEC, Groups were redefined and non-arcing, sparking or heat producing equipment marked for Group C should be suitable for Group D and is most likely marked that way.