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• ## NEC Table 310.15(B)(16)

Existing Table Title:

Allowable Ampacities of Insulated Conductors Rated Up to and Including 2000 Volts, 60C Through 90C (140F through...

• ## MLO Sub-panel with inverter and loads wire sizing

Hey Guys,

I have a situation and wondering if my thinking is correct and looking for the applicable codes.

I have a 60A subpanel...

• ## Demand Factor Tables used for Ampacity/OC Protection?

Hey All, I'm about to take the Journeyman exam. I'm using several study books that seem to be contradicting whether or not the demand factors in Art 220...

• ## Simple Ampacity Calculation Question

Student studying for electrical calculations final and need help with the following question:

Given 2 Electric ranges sized at 5500W, 2...

• ## Singlecore/Multicore cable, more than 1 cable per phase.

Hi all,

Having a range of cross-sections for multicore cables (if higher, then singlecore), I am used to calculating the cable cross sections...

• ## Interpretation of 310.15(B)(6)

This section states that conductors as listed in the table shall be allowed for service conductors that act as the main power feeder. But then they define...

• ## 320A Service

I am putting together an estimate for a house that is going to have a 320A service. - It's been a looooooonggg time since I have done one of these. I...

Hey all,

So I'm looking for a percentage as to what a continuous load can be in a distribution panel:

EX: 200a 1ph...

• ## Compact Aluminum Conductor Ampacity Rating

Do compact AL conductors have different allowable ampacities than regular conductors? My understanding was that compact conductors allowed you to put...

• ## Can 14 AWG copper conductors be used to supply a light fixture on a 20 amp circuit?

Let's say there's a branch circuit protected by a 20 ampere breaker. A 12/2 (with ground) NM cable runs from the breaker, out to a switch box. Inside...

• ## High Ampacity Conductors for Large Motors

Is there any NEC approved high capacity cabling for wiring 600hp, 720AMP (nameplate) motors? Is diesel locomotive cable ( RHH, RHW-2) the highest capacity...

• ## Difference between TABLE 310.15(B)(16) and (ANNEX B) TABLE B.310.15(B)(2)(1)

TABLE 310.15(B)(16) address up to three current carrying conductors in raceway, cable, or directly buried. TABLE B.310.15(B)(2)(1) covers two or three...

• ## Temperature conductor rating

I need to run some conduit and wire to a rooftop 3 phase RTU. The plans call for a maximum circuit ampacity of 98 amps with a 100 amp breaker. I want...

• ## Autorecloser fuse saving scheme - lowset based on load current or conductor ampacity

Good day,

I am brainstorming a coordination problem whereby the inverse time overcurrent lowsetset pickup of an autorecloser has to be...
Last edited by kenth619; 08-26-13, 03:40 PM.

• ## Underground Feeder Ampacity

I have 4000A and 2500A underground feeders from two main services to the building disconnects. A code official has concerns with the heat effects of...
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