Washington 01 Journey Level Electrician Exam, Feeders and Overcurrent Protection: all 47 questions

All questions from the Feeders and Overcurrent Protection section for Washington 01 Journey Level Electrician Exam, each with the correct answer.

3001Which location is prohibited for an OCPD in all three editions?
3002When the handle of a circuit breaker is operated vertically, what position must be the on position?
3004A series combination rating may not be used when motors connected between the two devices contribute more than what percentage of the lower-rated breaker's interrupting rating?
3005When may a feeder OCPD be sized at 100 percent of the continuous load?
3006In which case is the next size up rule not permitted?
3007The available fault current at a panelboard is 18,000 A. Which breaker interrupting rating is acceptable?
3008What is the maximum rating of a plug fuse?
3009A feeder is protected at 400 A. What is the minimum copper THWN tap conductor at 75 degrees C for a 25 ft tap?
3010What is the maximum height of the center of the operating handle of a circuit breaker in its highest position?
3011A 400 A feeder OCPD protects a feeder. Field-installed 10 ft tap conductors leave the enclosure. What is the minimum tap ampacity?
3012In other than dwelling units, service equipment must be field marked with what information?
3013How long must a load run to be considered a continuous load?
3014Which of the following is not a standard ampere rating for an inverse time circuit breaker?
3015Under the 25 ft feeder tap rule, what minimum ampacity must the tap conductors have?
3016In a dwelling unit, in which location are OCPDs prohibited?
3017Which situation is an exception to the small conductor rule?
3018Transformer secondary conductors not over 25 ft long must have an ampacity of at least what value?
3019What must the interrupting rating of a circuit breaker be at least equal to?
3020Why may an OCPD panelboard not be installed in a clothes closet?
3021What is the maximum OCPD rating for which the next size up rule may be used?
3022A feeder supplies 100 A of continuous load and 30 A of noncontinuous load. What is the minimum feeder conductor ampacity before any adjustment?
3023What is the role of a supplementary overcurrent protective device?
3024Unless specifically permitted elsewhere, what is the maximum OCPD for 12 AWG copper conductors?
3025A feeder conductor has an ampacity of 115 A and does not supply receptacles for portable loads. What is the largest standard OCPD permitted under the next size up rule?
3026GFPE is required for a feeder disconnect rated 1000 A or more on which system?
3027Unless specifically permitted elsewhere, what is the maximum OCPD for 14 AWG copper conductors?
3028Three parallel sets of conductors give a total ampacity of 1140 A. What is the largest standard OCPD permitted?
3029Which standard OCPD rating comes directly after 800 A?
3030A circuit breaker has an interrupting rating other than what value must be marked with that rating?
3031When is a 1200 A feeder disconnect on a 480Y/277 volt system not required to have its own GFPE?
3032What is the length limit for outside feeder tap conductors that terminate at a single OCPD that is part of or next to the building disconnect?
3033Under the 10 ft feeder tap rule, field-installed tap conductors that leave the enclosure must have an ampacity of at least what fraction of the feeder OCPD rating?
3035A feeder supplies a continuous load of 160 A only. What is the minimum rating of the feeder OCPD, assuming standard equipment not rated for 100 percent operation?
3036In a multi-tenant building, who must have ready access to the OCPDs protecting the conductors supplying a tenant space?
3037Arc energy reduction is required where the highest continuous current trip setting of a circuit breaker is at least what value?
3039May an OCPD be placed in a grounded conductor?
3040Which statement about supplementary OCPDs is correct?
3041Unless specifically permitted elsewhere, what is the maximum OCPD for 10 AWG aluminum conductors?
3042How must a 25 ft feeder tap terminate?
3043What is the general rule for the location of OCPDs?
3044A building main disconnect, not the service disconnect, is rated 1200 A on a 480Y/277 volt system. What does the NEC require?
3045A 120/240 volt slash rated circuit breaker may be used on which system?
3046Where a premises has feeders supplied from more than one nominal voltage system, how must the ungrounded feeder conductors be identified?
3047Which value is an additional standard ampere rating for fuses only?
3048What does selective coordination of OCPDs achieve?
3050Which of the following is a standard ampere rating for fuses and inverse time circuit breakers?
3051A circuit breaker used to switch 120 volt fluorescent lighting on a regular basis must be marked with which designation?

Washington 01 Journey Level Electrician Exam, Feeders and Overcurrent Protection: all 47 questions

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