Mixed Voltage on a 2 pole switch
- Thread starter hae
- Start date
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- Location
- Illinois
- Occupation
- retired electrician
charlie
Senior Member
- Location
- Indianapolis
Re: Mixed Voltage on a 2 pole switch
The following response is from Mark Ode is the Underwrites Laboratories principal representative on CMP-4.
This is not permitted since the switch must be listed for more than one circuit so would be a violation of Section 110.3(B). See the attached text from the 2004 UL White Book.
SNAP SWITCHES (WJQR)
General Use Snap Switches are so constructed that they can be installed in flush device boxes or on outlet box covers or otherwise used in connection with wiring systems recognized by the National Electrical Code.
Door switches are evaluated for use only in combination with a specific switch, special switch box and cover. See Switches, Door (WLFV). Flush snap switches that have been investigated for use without separate outlet boxes with Types NM and MNC cable in accordance with the National Electrical Code are so identified by specific marking on the carton in which they are packed.
Snap switches have not been investigated for switching a load between two alternate sources of supply. Double throw enclosed switches (see Switches, Enclosed [WIAX]) or switches Listed as transfer switches (see Switches, Miscellaneous [WPZX] and Emergency Lighting and Power Equipment [FTBR]) should be used for this purpose.
Multi-pole, general use snap switches have not been investigated for more than single circuit operation unless marked "2-circuit" or "3 circuit."
This was completely answered on the other thread. If you have additional comments or questions, please address them on the one that Don linked.
The following response is from Mark Ode is the Underwrites Laboratories principal representative on CMP-4.
This is not permitted since the switch must be listed for more than one circuit so would be a violation of Section 110.3(B). See the attached text from the 2004 UL White Book.
SNAP SWITCHES (WJQR)
General Use Snap Switches are so constructed that they can be installed in flush device boxes or on outlet box covers or otherwise used in connection with wiring systems recognized by the National Electrical Code.
Door switches are evaluated for use only in combination with a specific switch, special switch box and cover. See Switches, Door (WLFV). Flush snap switches that have been investigated for use without separate outlet boxes with Types NM and MNC cable in accordance with the National Electrical Code are so identified by specific marking on the carton in which they are packed.
Snap switches have not been investigated for switching a load between two alternate sources of supply. Double throw enclosed switches (see Switches, Enclosed [WIAX]) or switches Listed as transfer switches (see Switches, Miscellaneous [WPZX] and Emergency Lighting and Power Equipment [FTBR]) should be used for this purpose.
Multi-pole, general use snap switches have not been investigated for more than single circuit operation unless marked "2-circuit" or "3 circuit."
This was completely answered on the other thread. If you have additional comments or questions, please address them on the one that Don linked.
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