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Tap Conductor Rules. MAIN RULE: The Overcurrent Device Must Be Located At The Point Where The The Conductor Receives Its Supply. Feeders Can Be Tapped Under The Following Conditions. 1. Not Over 10 feet.

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Presentation Transcript
slide2

MAIN RULE:The Overcurrent Device Must Be Located At

The Point Where The The Conductor Receives Its Supply

Feeders Can Be Tapped Under The Following Conditions

  • 1. Not Over 10 feet

2. Not Less Than The Combined Loads, Ampere Ratings of Switchboards , Panelboards, or Control Devices.

3. Termination Is Not Made Beyond the Switchboard, Panel or Control Device

4. Conductors Must Be Protected Form Damage

10 Foot Tap RuleArt. 240.21.b.1.1

5. Tap Conductor Ampacity Not Greater Than 10 times The

Overcurrent Device.

tap conductors 10 feet or less article 240 1 b 1
Tap Conductors 10 Feet or LessArticle 240.1.b.1

Minimum size secondary conductors

Article 240.21.B.1

3m (10) ft Tap Rules

slide4

MAIN RULE:The Overcurrent Device Must Be Located At

The Point Where The The Conductor Receives Its Supply

Feeders Can Be Tapped Under The Following Conditions

  • 1. Not Over 25 feet

2. Not Less Than The Combined Loads, Ampere Ratings of Switchboards , Panelboards, or Control Devices.

3. Termination Is Not Made Beyond the Switchboard, Panel or Control Device

4. Conductors Must Be Protected Form Damage

25 Foot Tap RuleArt. 240.21.b.1.1

5. Tap Conductor Ampacity Not Less Than 1/3 the size of the

Overcurrent Device.

overcurrent protection transformer primary plus secondary conductors article 240 21 c 5
Overcurrent Protection Transformer Primary Plus Secondary ConductorsArticle 240.21(C)(5)

Tap Conductor Ampacity Must Be At Least One Third Of The OCPD

Secondary Conductors

Cannot Be Over

Ten Feet

example
Example

250 Amp

Overcurrent

Protection

Device

( Circuit Breaker)

Tap Conductors

Ampacity of these

conductors is 40 amps

slide8

250 Amp

Circuit Breaker

Circuit Breakers

Circuit Breakers

Tap conductors –

40 amps

of ampacity

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