wmabantajr
Member
What type of MC cable would I use for a hospital grade, isolated ground device? Isolated ground MC cable?
Cable for hospital grade, isolated ground device
- Thread starter wmabantajr
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Before we talk about the cable I think you need to know that there is no such thing as a HG isolated ground receptacle. The terms Hospital Grade and Isolated Ground are contradictory.
There is no way a device can meet the requirements of 517.13 and be isolated ground. Before the 2011 cycle there was an article section 517.16 that could never be used because of 517.13,
Roger
wmabantajr
Member
That's strange? Why does Leviton offer then? See attached.
You got me and that's the first time I've seen that device so I stand corrected
With that said, they can not be used in a patient care area for the reasons I posted above and if you notice, 517.16 was removed in 2011. Patient care areas require parallel or redundant grounding.
Isolating the metalic raceway from the insulated conductor does not acheive redundancy and is in violation of 517.13
Roger
wmabantajr
Member
This is for a laboratory, not a patient care area so I should be ok. What would you suggest using? HCF MC cable or IG MC cable?
Since it's in a lab you really don't need a HG receptacle and for this area either cable is fine. I would use the cheaper of the two choices.
Roger
Our lab power installer typically installs HG IG receptacles all the time. Once I saw what those cost, I said HG was not a requirement (I think they use those to upsell and get a bit more profit). Really, I'm no fan of IG either, as each lab has its own transformer, EGCs are run in each conduit, and the circuits tend to be dedicated.
I thought HG was a durability standard. These can take the most plug mate/demates while maintaining required prong pressure.
I thought HG was a durability standard. These can take the most plug mate/demates while maintaining required prong pressure.
You are correct for receptacles, HG it is a performance and durability standard. See the second page of the PDF below.
http://www.womackelectric.com/wp-content/uploads/2011/05/P-S-Hospital-Grade-Devices-Catalog.pdf
Roger
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