Guidelines

What does Article 220 of the NEC cover?

What does Article 220 of the NEC cover?

Based on the 2020 National Electrical Code. Article 220 of the 2020 National Electrical Code (NEC) contains the requirements for calculating demand loads for branch circuits, feeders, and services.

What is Article 200 of the NEC?

This article of the NEC avoids the term “neutral” and refers to the grounded neutral conductor as a grounded conductor. Article 200 covers conductor identification for grounded conductors, terminal identification, and grounded conductors in premise wiring.

How many parts are in Article 220 and why this article is important for the electrician?

The four parts of this article include: I. General, II. Feeders and Services, III. Optional Calculations for Computing Feeder and Service Loads and IV.

What is the demand factor for a water heater?

Demand-Diversity Factor Value Quick Reference

Diversity Factor (NBC)
Type of Load Type of Building
Water heater (instantaneous) 100 % of full load of largest Appliance + 100%of full load of second largest appliance + 25 %of full load of remaining appliances
Water heater (thermostatically controlled) No diversity

What states have adopted the 2020 NEC?

These states have adopted the 2020 edition of the NEC: Colorado, Georgia, Massachusetts, Minnesota, North Dakota, South Dakota, Texas, Washington, and Wyoming.

What states have adopted the NEC?

State Current Adopted Edition of NEC (Effective Date)
Alaska 2017 (5/9/2018)
Arizona Local adoption only
Arkansas 2017 with AR amendments (1/1/2018)
California 2017 with CA amendments (1/1/2020)

What are the articles of the NEC?

Explore the 2020 NEC®

  • Chapter 1 General. 100 Definitions.
  • Chapter 2 Wiring and Protection. 200 Use and Identification of Grounded Conductors.
  • Chapter 4 Equipment for General Use.
  • Chapter 5 Special Occupancies.
  • Chapter 6 Special Equipment.
  • Chapter 7 Special Conditions.
  • Chapter 8 Communications Systems.

What are the two cases where outdoor receptacles are exempt from GFCI protection?

List the two cases where outdoor receptacles are exempt from GFCI protection. Outdoor receptacles are required to be GFCI protected, 210.8(A)(3). Exempt are receptacles that are not readily accessible, are supplied by a dedicated branch circuit, and serve snow-melting or deicing equipment; see 426.28.

Do all outlets have to be tamper resistant?

Tamper-Resistant Receptacles (TR): All 15- and 20-ampere receptacles in a home are now required to be tamper-resistant. Tamper-resistant receptacles have built-in shutters that prevent children from inserting foreign objects in the receptacle slots.

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