Which is Neutral / Hot Wire? (SPT-2)

snikcillaMarch 9, 2010


I want to add a (single pole cord) switch to an electric blanket cord...

(because when plugged in, the power light is always on and the control unit is always too warm, even when blanket is off.)

...Directions say strip only hot wire. But wire is white flat flexible cord (SPT-2) no ribbing. How do I tell which wire is hot from the outside?

There is "printing" only on one of the 2 wires. Would that be the hot wire?

Thank you.

Thank you for reporting this comment. Undo
Ron Natalie

No, the printing or ribs goes on the neutral wire by convention.

Of course, modifying the appliance screws up your UL certification (if you care).
The other option is that you can find at your local discount store or home center an extension cord with a switch already in it.

Here is a link that might be useful: Example of what I'm talking about

    Bookmark   March 9, 2010 at 7:59AM
Thank you for reporting this comment. Undo

Assuming you have a polarized plug on that there blanket of yours, look closely at it. the 'blade' that goes in the wider slot is NEUTRAL. The narrower one is hot, and the one you want. Follow the wires from the plug.

    Bookmark   March 9, 2010 at 1:41PM
Sign Up to comment
More Discussions
Grounding Service panel 200amp
Is the new NEC saying to no longer run # 4 copper wire...
Code changes
In outlining the electrical layout for our new home,...
Garage florescent light flickering - bulb or fixture problem?
I replaced the GE F40 RES garage lights with a GE F40...
bibbus 7b
can homeowner so electrical work in his own home ? (above ground pool)
I live in Western ma and I'm having an Adobe ground...
Installing 220/240V. 50/60Hz appliances from Europe
I hope to install a "Domino" modular system...
Sponsored Products
Blocs Collection Glass Chrome One Light Wall Sconce
Euro Style Lighting
Glitter Porcelain Trailer Ornament Set
$19.99 | zulily
BLux | Julieta Wall Light
$782.40 | YLighting
Urban Swag Bath Bar
JESCO Lighting Track Lighting 144 in. Low Voltage 300W Monorail Kit With 6 Blue
Home Depot
Ananas Wall Sconce
Juno Track Lighting Trac-Lites Black Track Continuation Kit R49BL
$26.58 | Home Depot
Brushed Nickel Black Shade 22" Wide Crystal Chandelier
Euro Style Lighting
© 2015 Houzz Inc. Houzz® The new way to design your home™