Where nonmetallic-sheathed cable is used with nonmetallic boxes no larger the 2 1/4 inches X 4 inches, the cable is not required to be secured to the box if the cable is fastened within at LEAST ____ of the box.
Where the premises wiring systems has branch-circuits supplied from more than one nominal voltage system, each underground conductor of a branch-circuit shall be identified by ____ at the panelboard.
When Type NM cable is installed through slots or holes in metal framing members, the NEC requires which of the following for the protection of the cable?
When a single branch-circuit or a multiwire branch circuit with an equipment groundin conductor is supplying a detached garage from a house, what, if any, additional grounding electrode(s) is/are required at the garage?
When exceptions are not applicable, the MINIMUM size underground service lateral conductors permitted by the NEC is ___.
The rating of a branch-circuit supplying a fixed, starage-type, electric water heater with a capacity of 120 gallons or less, shall NOT be less than ____ of the full-load current of the water heater.
You are to install several 1,000-watt, 240-volt, six (6) feet long baseboard heaters in a residence. Determine the MAXIMUM number of heaters that may be supplied by a single 20-ampere, 240-valt, single-phase branch circuit.
When a 20-ampere rated branch circuit supplies a single receptacle outlet, the rating of the receptacle must NOT be less than ____.
Where a dwelling unit contain a foyer that us not part of a hallway and has an area that is GREATER than ____ square feet, the foyer shall have a 15- or 20-ampere, 125-volt general-use receptacle located in each wall space 3 feet or more width.
When applying the general method of calculation for a dwelling unit, what is the feeder and service demand load, in kW, for one (1) 8 kW rated residential electric range?
Where branch-circuit conductors supplying a fluorescent of HID luminaire are contained wthin the ballast compartment and are within 3in. of the ballast, the conductors are required to have an insulation temperature rating NOT lower than _____.
Conductors tapped from a 50-ampere branch circuit supplying electric ranges, ovens and cooktops shall have an ampacity of NOT less than ____ and shall be of sufficient size for the load to be served
What is the allowable ampacity of a size 14/3 AWG Type SJO flexible cord, when only two (2) of the conductors are considered current-carrying?
Where a direct buried landscape lighting circuit to be installed carries 24 volts and Type UF cable is to be used as the wiring method, the cable must be buried with an earth cover of at LEAST ____.
A 30-ampere residential branch circuit may supply ____.
When installing an overhead service using a rigid metal conduit (RMC) mast for the support of the service-drop conductors, the mast shall be of adequate strength or be ___ to safely withstand the strain imposed by the service-drop.
