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bobo 11-29-2005 03:18 AM

pull chain switch
 
hi,

i just replaced a pull chain switch for the lights on a ceiling fan. it has 5 60 watt lamps, so 300 watts, i installed a 6a@125vac switch, which should be good, cause 300 watts will draw 2.5amps. but the switch was labeled 3a 125vl/6a 125vac, 3a 250vac. what is "vl"

thanks,
bob

mdshunk 12-03-2005 07:34 PM

You may remember from high school that "L" is the symbol for inductance.

"VL" stands for Volts, Inductive. Examples of inductive loads include motors, solenoids, and relays. Inductive loads exhibit inrush of current, when energized, that can be many times the regular current draw. Also, when de-energized, the magnetic field collapses, generating a high voltage transient. This transient can cause arcing across mechanical switching contacts or can cause damage to solid-state contacts. For this reason, swtiches either have a "VL" rating or a "horsepower" rating that is much less than their rating when used on other load types, such as your incandescent lamps. Everything you thought you knew about sizing switches goes out the window when sizing a switch for inductive loads; particularly motors.

bobo 12-28-2005 05:16 PM

this switch is ONLY controlling the lights of the ceiling fan, motor is on a 3 position pull switch of its own. so the 6a/125vac switch should be ok, for just the lights, right?

bob


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