What is the NEC tap rule?

tap rule states that a cable rated for at least 10% of the rating of the upstream protective device must be used. In this example, we see that multiple taps are used coming from a single circuit breaker as long as all of the taps comply with the NEC requirements.

What is the 25 ft tap rule?

The 25-foot tap rule requires the tap conductors to be not less than one-third of the rating of the overcurrent device protecting the main feeder to which the tap is made.

What five conditions must be met in order for the 10 TAP rule to be applied?

For the 10 foot tap rule, tap conductors must be enclosed by a controller or raceway, they cannot be longer than 10 feet, and, where field installed, they must be protected by an overcurrent device on the line side of the tap conductor, with a rating or setting not greater than 1000% of the tap conductor ampacity.

What is the 100 Tap rule?

The length of the tap conductors horizontally shall not be more than 25 feet, and the total length shall not exceed 100 feet. This requirement for horizontal length is not just for a straight run; it includes the total horizontal length such as 90-degree bends.

How many times can you tap a feeder?

Feeders can have taps that are not more than 10 feet long, taps not more than 25 feet long, taps more than 25 feet and not longer than 100 feet, and outside feeder taps of unlimited length.

What is electrical tap?

: a device permitting the attachment of a branch electrical circuit to a main circuit by means of an attachment plug or cap.

Can you tap a branch circuit?

16 extension cord of any length can be tapped from a 20-ampere branch circuit. These long cords can easily be overloaded; a No. 16 cord with an ampacity of 10 fed from a branch circuit protected at 20 amperes.

Can you tap service entrance conductors?

Service-entrance conductors shall be permitted to be spliced or tapped in accordance with 110.14, 300.5(E), 300.13, and 300.15. Power distribution blocks, pressure connectors, and devices for splices and taps shall be listed.

Can you tap a tap?

You can’t tap a tap; that is, don’t use a tapped conductor to supply another conductor. This rule isn’t explicitly stated, but: You can infer this rule from the first paragraph of 240.21(B). By definition, a feeder tap is to a feeder, not to a tap.

Can you tap service conductors?

Can I splice service-entrance cable?

Service-entrance conductors can be spliced or tapped per 110.14, 300.5(E), 300.13, and 300.15 [230.46]. While the NEC allows this, maintenance considerations often make this method inadvisable.

What are the NEC tap rules for Electrical Code?

NEC 2014 edition electrical code tap rules The NEC article dealing with overcurrent protection of feeder taps is article 240.21(B). These rules are often referred to as the NEC “tap rules”. There are five tap rules related to feeder circuit taps: − Taps Not Over 3 m (10 ft.) Long − Taps Not Over 7.5 m (25 ft.) Long

What are the new tap rules for power lines?

A highly simplified paraphrasing of the NEW tap rules has two main points: 1. A conductor rated a minimum of 10% of the ampacity of a feeder conductor may be tapped from the feeder provided its length is not greater than 10 feet and it terminates in an appropriately sized overcurrent protective device. 2.

Does the NEC allow overcurrent protection for tap conductors?

The NEC does permit conductors that are identified as “tap conductors” to have overcurrent protection set at a value that greatly exceeds the ampacity of the conductors. However, this is only permitted under specific conditions as contained in 240.21.

What are the rules for feeder tap conductors?

Feeder Tap Rules. 10-Foot Feeder Tap Rule [240.21(B)(1)] Feeder tap conductors can be run not over 10 ft without overcurrent protection at the point they receive their supply, but they must be installed in accordance with the following requirements: Figure 1. (1) The ampacity of the tap conductor is: