AL SER Ampacity Column

[Alwayslearningelec]

I know romex you need to use the 60 degree column. Same apply to SER cable? Thank you for the feedback.

 

[infinity]

I know romex you need to use the 60 degree column. Same apply to SER cable? Thank you for the feedback.

What code cycle? For 2020:

338.10(B)(4) Installation
Methods for Branch Circuits and Feeders.
Informational Note No. 1: See 310.14(A)(3) for temperature limitation of conductors.
Informational Note No. 2: For the installation of main power feeder conductors in dwelling units refer to 310.12.
(a)Interior Installations.
(1) In addition to the provisions of this article, Type SE service-entrance cable used for interior wiring shall comply with the installation requirements of Part II of Article 334, excluding 334.80.
(2) Where more than two Type SE cables containing two or more current-carrying conductors in each cable are installed in contact with thermal insulation, caulk, or sealing foam without maintaining spacing between cables, the ampacity of each conductor shall be adjusted in accordance with Table 310.15(C)(1).
(3) For Type SE cable with ungrounded conductor sizes 10 AWG and smaller, where installed in contact with thermal insulation, the ampacity shall be in accordance with 60°C (140°F) conductor temperature rating. The maximum conductor temperature rating shall be permitted to be used for ampacity adjustment and correction purposes, if the final ampacity does not exceed that for a 60°C (140°F) rated conductor.
(b)Exterior Installations.
(1) In addition to the provisions of this article, service-entrance cable used for feeders or branch circuits, where installed as exterior wiring, shall be installed in accordance with Part I of Article 225. The cable shall be supported in accordance with 334.30.
(2) Type USE cable installed as underground feeder and branch circuit cable shall comply with Part II of Article 340

 

[augie47]

See 338.10(B)

(opps posted on top of infinity)

 

[Alwayslearningelec]

Hard to understand

 

[curt swartz]

How is this SER being installed?

 

[infinity]

Hard to understand

Start with the code cycle and how it's being installed.

 

[Alwayslearningelec]

Exterior along fence.

 

[wwhitney]

Hard to understand

2020 NEC 338.10(B): if your SE cable has #10 or smaller conductors (very unusual, the only such product Southwire makes is 10/2 copper SEU), and it's in contact with thermal insulation (runs through an insulated cavity), then you are limited to 60C termination ampacity. Otherwise, you get to use the 75C termination ampacity if your terminations are so rated.

Cheers, Wayne

 

[infinity]

Exterior along fence.

Then use the 75° C ampacity in Table 310.16.