Instruments in a CL I DIV II GRP C and D
Instruments in a CL I DIV II GRP C and D
(OP)
I am installing instruments in a Class I Div II area. The instruments are classified for this area. do i need to seal the electrical connection to these instruments, what other provisions do I need tokep in mind when I wire these instruments. Where can I get good information on instrument installation in classified area.






RE: Instruments in a CL I DIV II GRP C and D
You would also have to use spesifications on your instruments to do calculations of the capacitance and inductanse.
The instrument should be classified for your zone requirements. Idealy your source should be in a safe area with your barrier leading out to your zone area.
If i remember correctly you must also use Ex rated glands
Here is a good link describing the basics.
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REMEMBER THAT YOU MUST CERTIFY THESE LOOPS with a certified explosion prevention authority
Hope it Helps
Regards
RE: Instruments in a CL I DIV II GRP C and D
Don
RE: Instruments in a CL I DIV II GRP C and D
Read Article 500 through 505 of the National Electrical Code. (Notice that the Class is a Roman Numeral and the Division is what we call an Arabic number, thus Class I Division 2.) Allow some time to digest this stuff.
John
RE: Instruments in a CL I DIV II GRP C and D