Panelboards - Type I vs Type II

[IamJonscranium]

Can someone explain the difference between type I and type II panelboards?

Eaton lists Type II as fusible, and Type I as breaker, but I have a submittal on a Type II with main and branch breakers in my hands right now (Square D).

Thanks for the help.

 

[Dennis Alwon]

Here is what I found in the White Book

Enclosures marked with a type may also be marked as follows: .
A Type 1 enclosure may be marked ??Indoor Use Only?? .
A Type 3, 3S, 4, 4X, 6 or 6P enclosure may be marked ??Raintight?? .
A Type 3R enclosure may be marked ??Rainproof?? .
A Type 4, 4X, 6 or 6P enclosure may be marked ??Watertight?? .
A Type 4X or 6P enclosure may be marked ??Corrosion Resistant?? .
A Type 2, 5, 12, 12K or 13 enclosure may be marked ??Driptight??
A Type 3, 3S, 5, 12K, or 13 enclosure may be marked ??Dusttight??
For equipment designated ??Raintight,?? testing designed to simulate exposure
to a beating rain will not result in entrance of water. For equipment
designated ??Rainproof,?? testing designed to simulate exposure to a beating
rain will not interfere with the operation of the apparatus or result in wetting
of live parts and wiring within the enclosure. ??Watertight?? equipment
is so constructed that water does not enter the enclosure when subjected to
a stream of water. ??Corrosion resistant?? equipment is so constructed that it
provides degree of protection against exposure to corrosive agents such as
salt spray.
??Driptight?? equipment is so constructed that falling moisture or dirt does
not enter the enclosure. ??Dusttight?? equipment is so constructed that circulating or airborne dust does not enter the enclosure.

 

[jim dungar]

Can someone explain the difference between type I and type II panelboards?

Eaton lists Type II as fusible, and Type I as breaker, but I have a submittal on a Type II with main and branch breakers in my hands right now (Square D).

There is no industry standard for using Type I or Type II to describe the protective devices in a panelboard.

There may be some manufacturers and engineers may use these designations but if so, they are on their own.

 

[IamJonscranium]

Here is what I found in the White Book

I'm not sure that's what it's referring to. I've never seen it called out like that. Just NEMA 1 or NEMA type 1. Never Class I Type I for the NEMA rating.

This is how the spec reads:

...conform to Federal Specification W-P115, Type I, Class 1, and all applicable ANSI, IEEE, and NEMA standards.

 

[Dennis Alwon]

I'm not sure that's what it's referring to. I've never seen it called out like that. Just NEMA 1 or NEMA type 1. Never Class I Type I for the NEMA rating.

This is how the spec reads:

Well it's not a NEC issue so it may be a manufacturers thing.