Even though you can run these devices on DC, the switches on these
appliances are not suitable for DC, only AC. You risk a fire.
You can close the switch just fine on, say, your hairdryer, but when you
attempt to turn it "off", the DC will often simply arc across the
switch, and current will continue to flow. This arc will start a fire.
AC turns off and switches polarity 120 times per second, which
extinguishes the arc when switches and fuses open. DC is steady with not
breaks or reversals.
You get a small warning when this happens. The switch will make a small
"hiss" and the appliance only partially shuts off. Turn the switch back
on and pull the plug. There will be an arc at the plug and you may avert
a fire. The switch is typically toast, however.
DIY EV conversions often ran into this problem. Folks would (attempt to)
use a hairdryer for heat and defrost. They would get more heat than they
bargained for when they tried to switch it off. :-)
Bill D.
On 7/9/2017 5:27 AM, ken via EV wrote:
I have 2 scooter s 22 and 24 cells. I hocked onto the pack with 120 volt
plug in . I was very please to find out I could run 120 led bulbs, 120
volt motors with cumutators, like drill, skill saw, jig saw, hair dryer,
etc... !!
Caution! watch your pack voltage and use the power tools LIGHTLY as the
voltage is lower and could burn out motors. this count be a great emerency
helper!! and a led bulb could run for weeks . Even the old compack
flouresnt bulbs ran fine.
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