Author Topic: When lamps begun having polarized plugs?  (Read 838 times)
Cole D.
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When lamps begun having polarized plugs? « on: March 25, 2023, 01:44:42 AM » Author: Cole D.
Does anyone know if there was a certain area where lamps started having polarized plugs? I’m guessing mid to late 1980s possibly?

And when did lamps started having wattage warning labels on them?
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Re: When lamps begun having polarized plugs? « Reply #1 on: April 13, 2023, 05:19:27 PM » Author: LampLover
Polarized plugs for lamps started in the late 1970's
I had a lamp with a polarized plug but the old really thin plug AKA no raised bump preventing you from touching the metal prongs and a very thin profile all over.

I would think the wattage was a 1980's thing but I'm not 100% sure on that so I can't be of much help sorry.
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Cole D.
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Re: When lamps begun having polarized plugs? « Reply #2 on: April 16, 2023, 12:42:20 AM » Author: Cole D.
 Interesting, I haven’t seen a polarized type of those older thin plugs.

I too was thinking the wattage warning labels were starting in the 1980s.
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Re: When lamps begun having polarized plugs? « Reply #3 on: April 16, 2023, 11:48:29 AM » Author: HPS_250
Yeah, late 1970s I believe. My house was built in 1978 and still has most of the original outlets, which are polarized. I used to live in a house from 1957 though, which also had most of the original outlets, which weren’t polarized or grounded.  :lol:
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Re: When lamps begun having polarized plugs? « Reply #4 on: April 28, 2023, 10:14:17 PM » Author: Cole D.
Weren’t some older ungrounded outlets polarized? I thought they were by the 1950s at least, but I don’t think I’ve seen anything from the 50-60s or before with a polarized plug anyway.
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