Dear NEMA: What does "...additional degree of protection against corrosion..." really mean
Dear NEMA: What does "...additional degree of protection against corrosion..." really mean
(OP)
What does NEMA mean by a Type 4X panel "...provides an additional level of protection against construction..."?
How do I know if this degree of protection is sufficient to protect the following types of enclosed features: 1) copper wire - terminal block connections; 2) fiber optic to CAT-5E media converters; 3) 120-24V transformers; 4) convenience receptacles; 5) uninterruptable power supplies, etc.?
Thank you for any feedback that you can offer!
How do I know if this degree of protection is sufficient to protect the following types of enclosed features: 1) copper wire - terminal block connections; 2) fiber optic to CAT-5E media converters; 3) 120-24V transformers; 4) convenience receptacles; 5) uninterruptable power supplies, etc.?
Thank you for any feedback that you can offer!
RE: Dear NEMA: What does "...additional degree of protection against corrosion..." really mean
NEMA 4X "additional level" means only that a NEMA 4 enclosure is made out of something that cannot corrode, often it means the enclosure is made out of fiberglass or polycarbonate instead of painted steel.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Dear NEMA: What does "...additional degree of protection against corrosion..." really mean
RE: Dear NEMA: What does "...additional degree of protection against corrosion..." really mean
- The original text says, "...provides an additional level of protection against construction..."?
- whereas it should have said, "...provides an additional level of protection against CORROSION..."?
I qualitatively understand that NEMA is suggesting that NEMA 4X rated panels are generally water tight. I gather that they must be qualitatively implying that NEMA 4X panels are also relatively gas tight (i.e., apart from any air movement that occurs in the conduits that interconnect with the panels).More specifically, my question pertains to whether or not NEMA has any quantitative definitions for how water tight and how gas tight an enclosure needs to be in order to carry the NEMA 4X rating? In other words, is there a standard set of defined tests that NEMA panels are subject to in order to meet the stated NEMA rating classification? I would be grateful for any information related to this subject matter.
Thank you!
RE: Dear NEMA: What does "...additional degree of protection against corrosion..." really mean
Keith Cress
kcress - http://www.flaminsystems.com
RE: Dear NEMA: What does "...additional degree of protection against corrosion..." really mean
https://www.nema.org/Products/Documents/nema-enclo...
RE: Dear NEMA: What does "...additional degree of protection against corrosion..." really mean
I think that, per itsmoked's suggestion, I will take a look through the Hoffman catalogues to see if they either have specific testing quantitative criteria or if they reference an industry testing standard that the NEMA ratings must comply with in order to satisfy the NEMA.org published generic definitions.
Thank you both again!
RE: Dear NEMA: What does "...additional degree of protection against corrosion..." really mean
I recall reading somewhere that the test for NEMA4 is a 1" hose at 64gpm for half an hour. I have also been told that a fire hose is quite a bit more powerful than this.
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JHG