Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

---

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ Tweakers' Asylum ]

---

[ Alert Moderator ]

---

RE: Circuit breaker - Equipment protection fuse question.

Posted by jea48 (A) on June 19, 2014 at 12:53:25

In Reply to: RE: Circuit breaker - Equipment protection fuse question. posted by Crazy Dave on June 19, 2014 at 12:29:19:

NEC Article 100 - Branch Circuit Definition

A branch circuit is a portion of a wiring system that extends beyond the final, automatic overcurrent protective device (i.e., fuse or breaker) which qualifies for use as branch-circuit protection, and terminates at the utilization device or outlet (such as a lighting fixture, motor, or heater).

"beyond" not "including". The circuit breaker is the Code-required branch-circuit protection.

If you have a better source, please provide it. I do want to know if I am wrong about this.

Dave

Hi Dave,

From NEC 2011 Code book word for word.

Quote.

Article 100 Definitions.

Branch Circuit. The circuit conductors between the final overcurrent device protecting the circuit and the outlets(s).
Page 70-27

Not sure what point you are trying to make though.

.

.

.
Again.

NEC Code prohibits a 20 amp rated receptacle from being installed on a 15 amp branch circuit.

NEC 2011 Table 210.21(B)(3) Receptacle Rating for Various Size Circuits

Circuit Rating ........ Receptacle Rating
..(Amperes) ...............(Amperes)
..... 15 .................. Not over 15
..... 20 ................. 15 or 20
..... 30 ................... 30
..... 40 ............... 40 or 50
..... 50 .................. 50

As you can see from the table a NEMA 5-20R 20 amp receptacle can only be installed on a 20 amp branch circuit. It cannot be installed on a 15 amp branch circuit.

Note that two or more 15 amp receptacles can be installed on a 20 amp circuit per NEC Code. A duplex is two receptacles.
NEC 2011 210.21(B)(3)
Receptacle Rating. Where connected to a branch circuit supplying two or more receptacles or outlets, receptacles ratings shall conform to the values listed in table 210.21(B)(3),

Jim

Edits: 06/19/14 06/19/14

This post is made possible by the generous support of people like you and our sponsors:

---

[ Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2024, Audio Asylum, all rights reserved ]

---

[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]

---