Section 700.21 does not permit a manual control switch for emergency lighting to be placed in a motion picture projection booth or on a stage or platform; the switch shall be located in the lobby or at a convenient accessible location. More often than not this includes passing an examination.While each jurisdiction can formulate its own exam, in all cases these exams contain content specific to the National Electrical Code (NEC).
Knife blade switch. Section 230.23(B) requires overhead service-drop conductors to be not smaller than 8 AWG copper or 6 AWG aluminum or copper-clad aluminum. Electrical continuity is required for metallic conduit to establish an effective ground-fault path and facilitate the operation of the overcurrent protective device. above the countertop or work surface. As explained in Section 330.5, the inside of all raceways and enclosures located underground is classified as a wet location. Part IV of Article 690 covers the wiring methods specified for use on solar photovoltaic (PV) systems arrays. Because of the presence of water and grounded surfaces that contributes to a potential shock hazard, Section 210.8(A)(7) confirms any 125-volt, 15- or 20-ampere receptacle installed within six (6) feet of a sink is required to be GFCI protected. As a result, knowing the NEC inside and out is perhaps the best way you can prepare to pass the journeyman electrician examination.Journeyman electrician licensing exams also often include content specific to electrical code established through the Institute of Electrical and Electronics Engineers and the International Code Council. As defined in Article 100, a continuous load is a load expected to continue for three (3) hours or more. Section 240.24(F) tell us "overcurrent devices shall not be located over steps of a stairway." Part VII of Article 250 covers the general requirements for methods of equipment grounding. A circuit breaker with an ampere rating of 75 amperes is not a standard ampere rating. Section 520.8 mandates the control of emergency systems in theaters to comply with the rules set forth in Article 700; Part V of Article 700 applies to the control of emergency lighting circuits.
To find the full-load current rating of the single-phase transformer apply the single-phase current formula as shown: Part V of Article 250 covers the requirements for bonding of electrical installations. Also, receptacles located more than 20 inches above countertops or work surfaces may interfere with the cabinetry to be installed. In no case shall the point of attachment of the service-drop conductors to be less than 10 ft. above finished grade. The provisions in Part II of Article 680 apply to the installation of wiring methods and equipment in or adjacent to permanently installed swimming pools. The installation specifications for armored cable, Type AC, are addressed in Part II of Article 320. Section 250.104(A)(1) requires metal water piping systems to be bonded to any of (1) the service entrance enclosure, (2) the grounded conductor at the service, (3) the grounding electrode conductor. The intent of Section 230.26 is to provide adequate vertical clearance of the conductors and prevent physical damage to the conductors and prevent persons from making accidental contact with the conductors which may create a shock hazard or electrocution.
The intent of this rule is to eliminate the use of unsightly extension cords (which reduces the amount of usable countertop space) on the countertop or work surface to supply cord-and-plug connected appliances. The intent of this rule is to ensure enough conductor slack for the terminal connections or splices to be made easily.
Where a 150 kVA, single-phase transformer having a secondary voltage of 120/240 is installed at a … To prevent overheating receptacles, a receptacle shall not supply a total cord-and-plug-connected load in excess of the maximum specified in Table 21(B)(2), where connected to a branch circuit supplying multiple receptables or other outlets.
In compliance with Section 210.52(C)(5), receptacle outlets installed for countertop or work surfaces in dwelling units may be located on or above, but not more than 20 in.
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