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Joined: Jan 2005
Posts: 5,445
Likes: 2
Cat Servant
Member
Just a reminder...there are rules...and then there are the exceptions!

When we wire receptacle for general use, we follow one set of rules. That set, however, has ten 'exceptions,' or special cases where different rules are followed. Two of these exceptions are ranges and welders.

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Joined: Jan 2003
Posts: 4,391
I
Moderator
I do not believe there is a need for a specific exception for ranges.

A 50 amp single receptacle can be supplied with a 30 amp branch circuit.

A 100 amp single receptacle can be supplied with a 30 amp branch circuit.

This is the rule for single receptacles.

Quote
220.21(B)(10 Receptacles.
(1) Single Receptacle on an Individual Branch Circuit. A single receptacle installed on an individual branch circuit shall have an ampere rating not less than that of the branch circuit.

Bob

[This message has been edited by iwire (edited 11-15-2005).]


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Joined: Nov 2005
Posts: 827
Likes: 1
J
Member
renosteinke....

When I was learning to use the parachute, we were told the 'chute needed a minimum of 200 ft to work.

Now, I suppose there is someone out there who will claim to jump all the time from 190 ft, and never had a problem. Or 180. Or 170.....

The point is, you can shave the rules all you like, but sooner or later you're going to run out of luck- and go SPLAT!

Hmmm, skydiving / receptacle ratings, never got the connection before. I think you're right. The reserve might open in 200'-300' but they teach you to have pack opening by 2500'-2000' & make your decision to cut away or ride what you've got by 1800'. All I know is that once you've pulled all your handles, it seems to take 179 minutes for the thing to open.(That & you owe a case of beer.) That 20 amp plug gives them better odds of having their product work properly. That ugly orange & black warning label on the center cell at the tail of my Raven doesn't help me keep from bouncing but it might help the folks that made my chute. That 20 amp plug could save the mfg & cook your keester if something goes wrong.

So if I have to unplug something in an emergency, do I look, grab, protect, pull, punch or look, grab, look, pull, pull?
Joe

Joined: Aug 2001
Posts: 545
A
Member
This reminds me of the size wire in a light fixture. I know code says ok, but how can you tie in fixture wires usually about 16 gauge to a 15a or 20a circuit?


The Golden Rule - "The man with the gold makes the rule"
Joined: Jan 2003
Posts: 4,391
I
Moderator
Quote
I know code says ok, but how can you tie in fixture wires usually about 16 gauge to a 15a or 20a circuit?

Because the design of the light fixture will prohibit the conductors being overloaded.

If there is a short circuit or ground fault those short pieces of 16 AWG will still cause the breaker to trip.


Bob Badger
Construction & Maintenance Electrician
Massachusetts
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