Title: Select OCDs.
Course: Building Trades II (17009-II) > Section: Electricity: Identifying and Installing Panelboards and Switchboards

Selection should include

- identifying the types of OCD fuses used in system wiring (e.g., plug, cartridge, blade, type S)
- identifying the types of circuit breakers in single- and three-phase systems (e.g., single-pole 120V, double-pole 208V/240V, triple-pole 480V)
- using the NEC to determine the correct type of OCD for use in existing and new installations.

IRC: Chapter 37, section E3705 (https://codes.iccsafe.org/content/IRC2018P4), covers overcurrent protection.

Process/Skill Questions:

- What is a data protection overcurrent protection device (DPOCPD)?
- How are overcurrent protection devices (OCPDs) selected in reference to wire size?
- Are breakers from different manufacturers interchangeable in the service entrance panel (SEP)? Why or why not?

NCCER Standards:

Electrical

- 26108-02 Raceways, Boxes, and Fittings
- 26109-02 Conductors