Batteries

[Kevin1414]

I work for a chemical plant that is a Class 1 Division 2. I am looking for information reguarding the use of battery operated clocks in that enviroment. The clocks we would like to put in are a single AA battery operated clocks. Is this ok? I have looked and can't find the answer. I could use your help.

Thanks

 

[north star]

& %

Kevin1414,

1st, ...Welcome to The Mike Holt Forum!

2nd, ...refer to Article 501.105(B)(1), `08 NEC......IMO,
the clock is an instrument that indicates time, and "No,
they would not be approved for installation in that
hazardous environment."

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[Smart $]

I work for a chemical plant that is a Class 1 Division 2. I am looking for information reguarding the use of battery operated clocks in that enviroment. The clocks we would like to put in are a single AA battery operated clocks. Is this ok? I have looked and can't find the answer. I could use your help.

Thanks

IMO such a clock is not covered by NEC requirements.

500.1 Scope ? Articles 500 Through 504. Articles 500
through 504 cover the requirements for electrical and electronic
equipment and wiring...

Electrical and Electronic Equipment. Materials, fittings,
devices, appliances, and the like that are part of, or in connection
with, an electrical installation.

Informational Note: Portable or transportable equipment
having self-contained power supplies, such as battery-operated
equipment, could potentially become an ignition source in
hazardous (classified) locations. See ISA-RP12.12.03-2002,
Recommended Practice for Portable Electronic Products Suitable
for Use in Class I and II, Division 2, Zone 2 and Class
III, Division 1 and 2 Hazardous (Classified) Locations.