# What table in the NEC lists conductor ampacities?

## What table in the NEC lists conductor ampacities?

Ampacities of Insulated Conductors From NEC Table 310.16 (2020 edition)

### What article can you find ampacities in the NEC?

Article 311
The Ampacity Table, formerly known as 310.15(B)(16), has been renamed as Table 310.16 through Table 310.21. Ampacity Tables for conductors over 2,000 volts can be found in Article 311.

#### What is 350 mcm rated for?

Related Resources

Size Temperature Rating of Copper Conductor
(AWG or kcmil) 60°C (140°F) 75°C (167°F)
300 KCMIL 240 285
350 KCMIL 260 310
400 KCMIL 280 335

What NEC article talks about the allowable ampacities of insulated conductors?

Table 310.15(B)(16) (formerly Table 310.16) in the National Electrical Code (NEC) provides allowable (or maximum) ampacities for insulated conductors rated up to and including 2,000 volts (V).

What size ground do I need for 50 amps?

Your conductors need to be 6awg and your ground needs to be 10awg per nec code for a 50a circuit.

## When can I use the 90 degree column?

The ampacity from the 90 degrees C column is appropriate only when all termination points, along that 90 degrees C conductor, have a temperature rating of 90 degrees C. Example – Three No. 3 THHN copper conductors are installed in a conduit feeding a remote panelboard in a commercial occupancy.

### How many amps will #2 aluminum wire carry?

Allowable Ampacities of Insulated Aluminum or CopperClad Aluminum Conductors

Conductor Size (AWG/KCMIL) 60°C/140°F TW, UF 90°C/194°F TBS, SA, SIS, FEP, FEPB, MI, RHH, RHW-2, THHN, THHW, THW-2, THWN-2, XHH, XHHW, XHHW-2, USE-2, ZW
4 55 75
3 65 85
2 75 100
1 85 115

#### How many conductors are in a NEC cable?

The cables do not have an overall outer jacket. Each cable has not more than three current-carrying conductors. The conductors are 12 A WG copper. Not more than 20 current-carrying conductors are installed without maintaining spacing, are stacked, or are supported on”bridle rings.”

What is the National Electrical Code allowable ampacities of insulated conductors?

National Electrical CodeAllowable Ampacities of Insulated Conductors Rated 0-2000 Volts As Excerpted from the 2002 National Electrical Code Ampacities of Not More Than Three Current-Carrying Conductors in Raceway, Cable or Earth. Based onAmpbient Temperature of 30°C (86°F)

How is the ampacity of a bare conductor determined?

(4) Bare or Covered Conductors. Where bare or covered conductors are installed with insulated conductors, the temperature rating of the bare or covered conductor shall be equal to the lowest temperature rating of the insulated con­ductors for the purpose of determining ampacity. (5) Neutral Conductor.