A listed welder calculation permits a supplied 70-percent demand factor on 50 amperes of rated primary current. What calculated current is carried?

Texas Journeyman exam practice question · Special Occupancies, Equipment & Conditions

A listed welder calculation permits a supplied 70-percent demand factor on 50 amperes of rated primary current. What calculated current is carried?

A15 amperes
35 amperes
C50 amperes
D71.4 amperes

Why B is correct

The question supplies the applicable factor, so multiply 50 amperes by 0.70 to obtain 35 amperes. Dividing by the factor or subtracting 70 as a raw number misuses the percentage.

Practice 6 more Special Occupancies, Equipment & Conditions questions

Timed mock exams, a wrong book and flashcards — one subscription covers every contractor exam line.

Start studying free

An EV supply equipment nameplate input is 40 amperes and no permitted load-management reduction applies. What branch-circuit ampacity is required?
Two loads are verified as noncoincident: a 72-ampere heating load and a 54-ampere cooling load. If the applicable calculation permits using only the larger, what load is carried?
A 60-ampere branch circuit is available exclusively for EV charging. With no load-management reduction, what maximum continuous EV input can it serve?
A marina load-calculation step contains 160 amperes subject to a supplied 75-percent demand factor. What load is carried for that step?
A welder calculation carries 42 amperes after applying a supplied 60-percent factor. What rated primary current was used?

A listed welder calculation permits a supplied 70-percent demand factor on 50 amperes of rated primary current. What calculated current is carried?

A listed welder calculation permits a supplied 70-percent demand factor on 50 amperes of rated primary current. What calculated current is carried?

More Special Occupancies, Equipment & Conditions questions