100 days of Article 100: Ampacity

Показать описание

Ampacity is one of the most important terms used in the NEC, know this definition and know it well.

Ryan Jackson

Рекомендации по теме

Комментарии

Thanks for another great vid. One thing that I always questioned my boss was derating when you have say 3 current carrying conductors along with several 24 or 120 volt control wires that only carry less then 1 amp. ( feed 1 or 2 motor startets ). He said that you never have to derate for control wires due to very small current flow on them. My father was one of the first eletricians to use type THHN/THWN in our city. When he tried to order it electric supply house never heard of this new type of insulation. Took a couple of samples into my vo tech class and teacher did not like it due to insulation being so much thinner then TW. Told him that THHN/THWN was gasoline & oil resistant and good for 90 degrees C in dry location. He finally came over to my side after reading about it in EC&M magazine. About 45 years ago EC & M magazine had an article where the Philadelphia Gas Company got approval to use say use #2 copper for over 200 amps because it was in area that was guess maybe 50 degrees F below zero for liquidfied natuaral gas pumps.

garbo

Accurate and informative, what's the ruling on the neutral a current carrying conductor yes? Three ways and four ways only one extra current carrying conductor yes? Why not list the possibilities where these conditions could exist..?

steve-o

If conductor is rated as continous use forever based on that chart n all conditions r met why do we add the 25% if using 3hr or more during load calculations?

mikewhitlock

Ampacity being a continuous rating, and circuit breakers being rated at only 80% of their rating for continuous loads, does this mean that you could have a conductor ampacity that is only 80% of the breaker rating?

realvanman

Is it permissible the have a 20 amp circuit, 20A ocpd/12awg wire with14 awg pigtails to the receptacles? Just so you can backstab. Thank you.

--JohnDoe

Are breakers degraded based on high temperature as in the southwest if I may ask.

bitsandpeace

Another great video Ryan. Thank you so much!!!

bitsandpeace

Liked the 12 THHN tags in the background.
🥃🥃🍺🍺🍺🍇🏌🏻‍♀️
Stay safe.
Retired (werk'n) keyboard super tech. Wear your safety glasses.

realestateservicessaleshea

100 days of Article 100: Ampacity

100 Days of Article 100: Outlet

100 Days of Article 100 Utilization Equipment

100 Days of Article 100: Device

100 Days of Article 100: Reconditioned

100 Days of Article 100: Continuous Load

100 Days of Article 100: Building and Structure

100 Days of Article 100: Equipment

100 Days of Article 100: Electric Power Production and Distribution Network

Nasdaq 100, S&P 500, Dow Jones Price Forecast Today: NDX, SPX, DJIA Technical Analysis (January ...

100 days of Article 100: Approved

100 Days of Article 100: IT Equipment and IT Equipment Rooms

100 Days of Article 100: Habitable Room

100 Days of Article 100: Fitting

100 Days of Article 100: Qualified Person

100 Days of Article 100: Exposed

100 Days of Article 100: Interactive System and Stand Alone System

100 days of Article 100: Appliance

100 Days of Article 100: Multioutlet Assembly

100 Days of Article 100: Dormitory Unit

100 Days of Article 100: Neutral Point and Neutral Conductor

100 Days of Article 100: Plenum

100 Days of Article 100: Switches

100 Days of Article 100: Service (and everything that goes with it)

100 Days of Article 100: Garage