# Can you run triplex in conduit?

## Can you run triplex in conduit?

Article 396 in the 2005 Nec references tri-plex not being used in conduit.

## How is wire derating calculated?

Multiply the conductor’s ampacity by the derating percentage. For example: The 12 gauge wire TW wire in the 52 C attic is derated to 76 percent of its maximum ampacity; 25 amperes x . 82 = 19 amperes.

Can you direct bury triplex?

Triplex is USE. It can be direct buried or run in conduit.

Do neutrals count as a current carrying conductor?

The neutral conductor of a 4-wire 3-phase circuit is considered a current-carrying conductor where the major portion of the neutral load consists of nonlinear loads.

### How do you find the derating factor?

One is laying depth, the second is the soil temperature and the third is soil resistivity. Total derating factor = 0.95*0.9*0.91 =0.77, Then multiply this value by the cable current. The resulted current should be the current carrying capacity for the cable.

### What wire can be buried in conduit?

THWN-2 Copper
THHN and THWN-2 Copper Building Wire is only approved to be buried in conduct, as it lacks the characteristics that would make it eligible for direct burial. UF-B and USE-2 are the standard direct burial cables.

Can you derate a neutral?

The corrected ampacity of the neutral conductor is 208 [0.80 × 260]. To comply with 310.15(B)(4)(c) where a major portion of the neutral conductor load is nonlinear, a derating factor of 70 percent applies.

How much current does neutral carry?

On any individual circuit (lamp or 120V outlet) the current in the neutral in that circuit is equal to the current in the “hot” wire.

#### What is the derating factor for cables?

The derating factor is applied to reduce the cable’s current carrying capacity. For example, if a X-90 cable can carry 40A @90 degrees, there may be additional factors which requires the cable to be de-rated such that it carries only 30A@90 degrees in the installation.

#### What is a derate factor?

Derate Factors Dust on the surface of an array results in energy loss. Each component of a solar PV system has efficiency losses. System wiring has efficiency losses. Available online PV system sizing programs will factor in these efficiency losses when making calculations for system sizing.

What is the maximum number of conductors allowed in a single conduit?

Conduit fill You appear to be fine for 12 wires in 3/4” EMT up to #10 wire.