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An AFCI is basically like a GFCI but it will protect the entire circuit from the breaker and back. 450.13]. , Enclosure Any case, housing, apparatus, fence, or wall surrounding an installation designed to prevent personnel from accidentally contacting energized parts to protect the equipment from physical damage serves as an enclosure. "I have learned, in whatsoever STATE I am, therewi, http://www.usahardware.com/inet/shop/item/30550/icn/20-068163/bussman/bp_sru.htm. Transformers having a secondary voltage not exceeding 1,000V, with primary overcurrent protection only, must have the primary overcurrent protective device sized per the percentages shown in Table 450.3(B) and the percentages mentioned in its applicable notes [Sec. Mandatory rules in the NEC contain the language For example, most of the general tips for setting it in place are not found in the NEC. as is. 450.3(B)]. D. THE DISCONNECTING MEANS IS READILY ACCESSIBLE. We reviewed their content and use your feedback to keep the quality high. Not Readily Accessible Capable of being reached quickly for operation, renewal, or inspections without climbing over or having to remove obstacles. NEC 2008 article 100 definitions. Feeder and branch-circuit conductors shall have overcurrent protection in each ungrounded conductor located at the point where the conductor receives its supply or at a location in the circuit determined under engineering supervision; Circuit breakers used for overcurrent protection of three-phase circuits shall have a minimum of three overcurrent relays operated from three current transformers. This tab has been removed to allow separate feeds of each outlet. Notwithstanding the provisions of paragraph (g)(6)(iv) of this section, exposed noncurrent-carrying metal parts of the following types of fixed equipment need not be grounded: Enclosures for switches or circuit breakers used for other than service equipment and accessible to qualified persons only; Electrically heated appliances that are permanently and effectively insulated from ground; Distribution apparatus, such as transformer and capacitor cases, mounted on wooden poles, at a height exceeding 2.44 m (8.0 ft) above ground or grade level; and. Over commercial areas subject to pedestrian traffic or to vehicular traffic other than truck traffic. 110.14(C)(1)(a)(3) and Table 310.16]. Branch Circuit Multi-wire D. Although the box contains a multi-wire branch circuit, only one ungrounded (hot) conductor is feeding this duplex receptacle. (If these areas are accessible to other than pedestrian traffic, then one of the other conditions applies). Signs warning of high voltage shall be posted where unqualified employees might come in contact with live parts. The article 100 definition of a branch circuit ends at an outlet. tribale maximize ANS: PTS: REF: Definitions 5 A contact device installed at an outlet for the connection of an attachment plug is an) rumpor und Sutlet canale ANS: PTS: REF: Definitions 6. of the box. The performance are generally affected by the factors like lag in the compensating devices, slow response of the sys. The conductors from the service point to the service disconnecting means are known as service conductors. Exposed noncurrent-carrying metal parts of cord- and plug-connected equipment that may become energized shall be grounded under any of the following conditions: If in hazardous (classified) locations (see 1910.307); If operated at over 150 volts to ground, except for guarded motors and metal frames of electrically heated appliances if the appliance frames are permanently and effectively insulated from ground; If the equipment is of the following types: Refrigerators, freezers, and air conditioners; Clothes-washing, clothes-drying, and dishwashing machines, sump pumps, and electric aquarium equipment; Hand-held motor-operated tools, stationary and fixed motor-operated tools, and light industrial motor-operated tools; Motor-operated appliances of the following types: hedge clippers, lawn mowers, snow blowers, and wet scrubbers; Cord- and plug-connected appliances used in damp or wet locations, or by employees standing on the ground or on metal floors or working inside of metal tanks or boilers; Portable and mobile X-ray and associated equipment; Tools likely to be used in wet and conductive locations; and.