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NASCLA Electrical
For terminations using wire binding screws, conductors not larger than ___________________ are not allowed - correct answer 10 AWG (110.14(A)) The high leg of a delta system must be ________________________ - correct answer Orange (110.15) Minimum DEPTH of a clear working space is - correct answer 3' (110.26(A)) Minimum width of working space is ___________ or the width of the equipment, whichever is greater. Doors must open at least ____________ - correct answer 30in, 90 Degrees (110.26(A)(2)) Minimum Height of working space is _________________ , or the height of equipment, whichever is greater. - correct answer 6'1/2" (110.26(A)(3)) Equipment over ____________________ or more than _____ ft. wide require _________ entrances to the working space. - correct answer 1200A, 6', 2 (110.26(C)(2)) Dedicated equipment space extends from floor to __________ above the equipment or structural ceiling - correct answer 6' (110.26(E)) What section covers enclosure types, such as NEMA 3R, which provides protection from incidental contact, rain, and snow and sleet? - correct answer (110.28) Grounded conductors must be ___________________ - correct answer white, gray, or three continuous white or gray stripes along insulation other than green (200.6) GFCI Protection Requirements are in which section? What are they? - correct answer (210.8)
Required circuits for dwelling units Include? - correct answer (2) 20A Small Appliance Circuits (1) 20A Laundry Receptacle (1) 20A Bathroom Branch Circuit (1) 20A Garage Circuit All 125-volt, 15- and 20-ampere receptacles installed in the following locations shall have GFCI protection: - correct answer Dwellings: Bathrooms Garages and work rooms of similar use Outdoors Crawl Spaces Unfinished basements not intended as habitable rooms Kitchens Sinks boathouses Bathtubs or Shower Stalls (within 6' of outside edge) Laundry Areas Not Dwellings: Bathrooms Kitchens Rooftops (210.8) What are the required circuits for a dwelling? - correct answer 2 20A Small Appliance 1 20A Laundry 1 120v 20A Bathroom (No other outlets) 1 20A Garage (No other outlets) (210.11(C))
When two or more single phase dryers are supplied by a 3-phase 4-wire feeder or service, the total load shall be calculated on the basis of ____________ the maximum number connected between any two phases. - correct answer twice It shall be permissible to calculate the load for commercial electric cooking equipment, dishwasher booster heaters, water heaters, and other kitchen equipment in accordance with table 220.56. The demand factor for these units is ___________ percent for the first two devices, and ____________ percent for the third and _________ percent for the fourth. - correct answer 100, 90, 80 Kitchen equipment demand factors shall not apply for ___________, ____________, and _______________ equipment - correct answer Space heating, ventilating, or air conditioning. (continuous) Optional load calculations for dwellings allow for: 100% of the first 10kva plus 40% of the remainder of the following loads: _________ VA per square foot for general lighting and receptacles _________ VA for each 2-wire 20-A small appliance branch circuit and each laundry branch circuit _________ VA for all appliances fastened in place permanently connected, or located on a specific circuit. _________ VA for all motors Add this with the heating and Air conditioning load - correct answer 3 1500 Name Plate Name Plate The optional method of calculation for dwelling units is reserved for - correct answer dwelling units supplied by service conductors with an ampacity of 100 amperes or greater.
When calculating the service-entrance conductors of a farm where all the buildings, including the dwelling, are supplied from a common service, the second largest individual load in the group shall be calculated at _____. - correct answer 75% The entire area of a service pit located in a commercial major repair garage that is not provided with mechanical ventilation is classified as a _____ location. - correct answer Class I Div I The MAXIMUM distance conduit seals are permitted to be installed from an enclosure that houses devices that produces arcs or high-temperatures in a Class I, Division 1 location is _____. - correct answer 18in Where three (3) switches are grouped or ganged in an outlet box without permanent barriers, the voltage between the adjacent switches shall NOT exceed _____. - correct answer 300V For box fill, the following count for how many conductors: Clamps, regardless of number Support Fittings Straps Grounding Conductor - correct answer 1 1 2 based on largest conductor 1 In order to determine the adequate size of a junction box containing size 4 AWG THWN copper conductors, the volume allowance, in cubic inches, required per conductor is _____. - correct answer when sizing pull and junction boxes containing conductors of size 4 AWG and larger, the box dimension is to be calculated based on the diameter of the raceways entering the enclosure and the rules specified in Section 314.28 are to be applied. Given: You are to install an underground run of trade size 2 in. Schedule 40 PVC conduit containing 120/240-volt, single-phase service-entrance conductors supplying a one-family dwelling. The PVC will not cross under any public streets,
Where a transformer supplies a single-phase, 120/240-volt, 600 ampere service, the transformer should have a kVA rating of at least _____. - correct answer 150kva Metal conduit installed in indoor wet locations must have a minimum airspace clearance of _____ between the conduit and the wall or supporting surface. - correct answer 1/4"
