Practical Electrical Wiring; Residential, Farm, and Industrial |
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Page 570
... Overcurrent Protection Combined . As al- ready discussed , the branch - circuit overcurrent protection may have an ampere rating several times as great as that of the running overcurrent protection . It is , however , required that its ...
... Overcurrent Protection Combined . As al- ready discussed , the branch - circuit overcurrent protection may have an ampere rating several times as great as that of the running overcurrent protection . It is , however , required that its ...
Page 571
... overcurrent protection . If a fused switch of the general type shown in Fig . 31-2 is used as a controller , and if the fuses are of the time - delay type with an ampere rating not greater than permitted for running overcurrent ...
... overcurrent protection . If a fused switch of the general type shown in Fig . 31-2 is used as a controller , and if the fuses are of the time - delay type with an ampere rating not greater than permitted for running overcurrent ...
Page 599
... overcurrent protection of not more than 5 - amperes rating . Where the current supply is from a transformer or other device having energy - limiting characteristics and approved for the purpose , or from primary bat- teries , the ...
... overcurrent protection of not more than 5 - amperes rating . Where the current supply is from a transformer or other device having energy - limiting characteristics and approved for the purpose , or from primary bat- teries , the ...
Contents
Preface | 1 |
Underwriters and Codes | 3 |
Basic Principles and Measurements | 15 |
Copyright | |
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Common terms and phrases
2-wire circuits 3-phase 3-way switches alternating current ampacity amperage amperes armored cable black wire branch circuit building cabinet ceiling Chap chapter circuit breaker circular mils clothes dryer Code in Sec Code requires Code Sec color conductors conduit connected connector consumed copper cord demand factor diameter disconnecting means discussed dry locations Electric equipment farm feeder Fixture wiring floor flow fluorescent lamp footcandles full-load current grounding wire heat horsepower hot wires installed insulation larger light locknut lumens maximum metal method minimum motor mounted neutral wire nonmetallic-sheathed cable opening operating ordinary outlet box overcurrent device overcurrent protection panelboard plug pole raceway range receptacle outlets screws service entrance service switch service-entrance shown in Fig similar single-phase sizes small appliance smaller solder sq ft switch box temperature terminal THHN tion transformer type shown usually voltage drop volts wall wattage watts white wire