Hugo G
Industrial
- May 15, 2018
- 5
Hello eng-tips,
TOday i come with a small question regarding enclosure certifications:
As far as I understand, NEMA 4X+7 is a denomination given for non-hazardous outdoor area (4X) and hazardous indoor Class I, Division 1, Groups A, B, C, or D (7)
What isn't clear for me are the groups requirements for type 7: in order to achieve type 7 certification, shall the equipment be approved to groups A, B, C and D or could it be a combination of these, BCD for example?
In this particular escenario, I have a FM certification as follows:
XP / I / 1 / BCD / T4
DIP / II / 1 / EFG / T4; Type 3, 4, 4X, 6, IP66, IP68
As i understand it, this equipment is approved as explosion proof for Class I, Division 1, Groups B, C and D, also a Dust-Ignitionproof certification for Class II, Division 1, groups EFG. As well as enclosure Type 3,4,4X and 6.
The 4X part is pretty clear, however, as for type 7, FM doesn't mention it in the provided approval guide. Could this equipment be classified as Nema 4X+7 considering it has XP certification for Class I, Division 1, Groups BCD?
The equipment we're talking about is an electric actuator, the fluid is LPG which is classified as group D by NEC.
Thank you in advance and please forgive any grammar mistake as english isn't my mother language.
TOday i come with a small question regarding enclosure certifications:
As far as I understand, NEMA 4X+7 is a denomination given for non-hazardous outdoor area (4X) and hazardous indoor Class I, Division 1, Groups A, B, C, or D (7)
What isn't clear for me are the groups requirements for type 7: in order to achieve type 7 certification, shall the equipment be approved to groups A, B, C and D or could it be a combination of these, BCD for example?
In this particular escenario, I have a FM certification as follows:
XP / I / 1 / BCD / T4
DIP / II / 1 / EFG / T4; Type 3, 4, 4X, 6, IP66, IP68
As i understand it, this equipment is approved as explosion proof for Class I, Division 1, Groups B, C and D, also a Dust-Ignitionproof certification for Class II, Division 1, groups EFG. As well as enclosure Type 3,4,4X and 6.
The 4X part is pretty clear, however, as for type 7, FM doesn't mention it in the provided approval guide. Could this equipment be classified as Nema 4X+7 considering it has XP certification for Class I, Division 1, Groups BCD?
The equipment we're talking about is an electric actuator, the fluid is LPG which is classified as group D by NEC.
Thank you in advance and please forgive any grammar mistake as english isn't my mother language.