Thhn - Study guides, Class notes & Summaries

Thermal insulation shall not be installed within ______ inch(es) of recessed fixtures correct answers3 An AC system of 50 to 1000 volts shall be grounded if maximum voltage to ground does not exceed ____ volts. correct answers150 The underwater light fixture shall be at least ____ inches below water level. correct answers18 A junction box for the 120 volt wet-niche fixture shall be at least ____ inches above the ground correct answers4 A GFCI protected ____ receptacle for the pump mo...

When testing a water level supervisory switch serving a pressure tank a signal shall indicate if the water level _____________from the required level (NFPA 72, Table 14.4.3.2 17 (j) (4) - Ans rises or falls over 3 inches If combination audible/visible appliances are installed the location of the installed appliance shall be determined by the requirements of _______. (Nfpa 72 18.4.8.1) - Ans the visible appliance What is the maximum number of 12 gauge THHN wires that can be installed in 1"...

Conductors with _____ marked on the insulation are NOT approved for use in a wet location. - ANSWER THHN conductors with THHN insulation are approved for use in dry and damp locations only and conductors with THWN, THHW, and THW insulation are recognized for use in dry and wet locations. Given: A one-family dwelling unit with a demand load of 200 amperes is supplied with a 120/240 volt, single-phase, electrical system from the local utility company. What is the MINIMUM size aluminum THW co...

Anex _____ in the NEC contains examples of load calculations for dwellings. o :## D Which of the installations listed below would be a wet location? -a receptacle installed on the exterior wall of a building - a run of PVC conduit installed on a fishing pier -a luminaire installed on a parking lot pole o :## all of these Which of the following is an example of a bare conductor? - a 12 awg THHN copper wire - the bare ground wire contained within romex (NM cable) sheathing -the bare alum...

What is the result if the neutral wire becomes open on a multiwire circuit having unequal loads? a. The load of higher resistance would overheat and probably be damaged. b. The load of lesser resistance would overheat and probably be damaged. c. No effect until one load is turned off or opens. d. No effect. a. The load of higher resistance would overheat and probably be damaged. Circuits 7 and 9 share a neutral. This is a multiwire branch circuit. If Ckt. 7 is drawing 13 amps and ...

A fixed light will be allowed to be 30 amp provided the socket is rated ____ duty. a. Light b. Medium c. Heavy d. Extra Heavy - ANSWERc. Heavy From the Skilled Trades Act, Section 7 "Except as otherwise provided in this article or in subsection (3), and individual other than an individual who is licensed under this article and ______________ working under the direction of a holder of an electrical contractors licence, shall not in any manner undertake to execute any electrical work"...

Anex _____ in the NEC contains examples of load calculations for dwellings. - Answer-D Which of the installations listed below would be a wet location? -a receptacle installed on the exterior wall of a building - a run of PVC conduit installed on a fishing pier -a luminaire installed on a parking lot pole - Answer-all of these Which of the following is an example of a bare conductor? - a 12 awg THHN copper wire - the bare ground wire contained within romex (NM cable) sheathing -the bare ...

Conductors with _____ marked on the insulation are NOT approved for use in a wet location. correct answer: THHN conductors with THHN insulation are approved for use in dry and damp locations only and conductors with THWN, THHW, and THW insulation are recognized for use in dry and wet locations. Given: A one-family dwelling unit with a demand load of 200 amperes is supplied with a 120/240 volt, single-phase, electrical system from the local utility company. What is the MINIMUM size aluminu...

Lesson 1: Conduit and Raceway Basics - Answer 1. The metric designators and trade sizes are for identification purposes only and are not actual dimensions, as pointed out in the note to NEC ? . - Answer b. Table 300.1(C) 2. Informative Annex C is part of the requirements of the NEC. - Answer False 3. Raceway is defined in the NEC as an enclosed channel designed expressly for holding wires, cables, or busbars, with additional functions as permitted in the Code - Answer True ...

Conductors with _____ marked on the insulation are NOT approved for use in a wet location. a. THW b. THHW c. THHN d. THWN correct answer: THHN As shown in Table 310.104(A), conductors with THHN insulation are approved for use in dry and damp locations only and conductors with THWN, THHW, and THW insulation are recognized for use in dry and wet locations. Given: A one-family dwelling unit with a demand load of 200 amperes is supplied with a 120/240 volt, single-phase, electrical system f...