Journeyman Electrician

A utility-approved drawing labels point X as the connection between its facilities and the premises wiring. The meter is at Y and the main disconnect at Z. Which label identifies the service point?

• AY, because every meter is the service point
• BX
• CZ, because the first disconnect defines the service point
• DWhichever point belongs to the customer

A raceway junction box is reached through a removable ceiling tile using a portable ladder, without damaging finish. The installation permits accessible wiring-method junctions there. A proposed disconnect at the same point must instead be readily accessible with no applicable exception. Which layout decision follows?

• ABoth qualify because access without damage is the only standard
• BThe box can meet its access rule while the disconnect location fails its stricter rule
• CBoth fail because a portable ladder makes every wiring box inaccessible
• DMove only the box and leave the disconnect because handles need no access review

A branch circuit supplies 8 A lighting at maximum current for 3.5 hours and 6 A equipment for two hours. Apply 125% to continuous current and 100% to noncontinuous current. No 100%-rated exception applies. Which offered usable capacity is the lowest that meets the calculated minimum?

• A14 A
• B16 A
• C10 A
• D17.5 A

A transformer secondary supplies a panel through conductors A. A 20 A branch-circuit breaker in that panel supplies a receptacle through conductors B. Which conductors are the feeder in this arrangement?

• AB, because a receptacle receives electrical energy
• BA, between the source and final branch-circuit breaker
• CBoth A and B, because neither is a utility service drop
• DNeither, because feeders must originate at utility service equipment

A branch conductor has supplied 90°C ampacity 40 A, applicable correction factor 0.80 and 75°C terminal limit 35 A. The circuit requires 34 A usable conductor capacity; all other constraints are satisfied. Should this conductor be accepted?

• AYes, because its 40 A insulation-column value exceeds 34 A
• BNo; its 32 A corrected capacity is below 34 A
• CYes, because the 35 A terminal limit exceeds 34 A
• DNo; every 90°C conductor must be treated as 60°C regardless of the marked terminals

Two generator transfer arrangements are compared. In A, the neutral remains solidly connected to the utility neutral. In B, all circuit conductors, including the neutral, are switched so there is no direct circuit-conductor connection to the other source. Which is the separately derived arrangement described?

• AA, because any generator is separately derived
• BB; grounding and bonding connections are excepted
• CBoth, because each generator winding is physically separate from the utility transformer
• DNeither, because their equipment grounding conductors are connected

A listed bonding jumper bridges a nonconductive fitting between two metal raceway sections. What electrical function is it intended to restore?

• ANormal neutral-load current through the raceway
• BElectrical continuity for fault current
• CA guaranteed earth resistance below 25 ohms
• DAdditional insulation between the raceway sections

A plan labels a self-contained residential unit with permanent provisions for living, sleeping, cooking and sanitation. Which missing feature would prevent another room arrangement from meeting that dwelling-unit description?

• AA separate utility meter
• BPermanent cooking provisions
• CA garage attached to the building
• DA particular number of bedrooms

An electrical-room plan shows a clear working space in front of a panel. A storage cabinet is later placed in that space, although the panel cover can still open. What is the correct inspection conclusion?

• AThe installation is acceptable whenever the cover opens
• BThe cabinet must be removed from the required working space
• CThe space may be used for storage if the cabinet is nonmetallic
• DWorking space is required only during initial construction

After a motor branch repeatedly trips, qualified inspection with the equipment safely isolated finds a phase conductor cut against the bonded enclosure. No overload of the driven machine is found. Which repair addresses the identified fault mechanism?

• ARaise the overload setting because all tripping indicates mechanical overload
• BRepair the damaged insulation and entry protection, then verify the circuit
• CDisconnect the enclosure bond to prevent current reaching it
• DReplace the breaker with a larger rating while leaving the damaged entry

A proposed service disconnect is deep inside a building after a long unprotected service-conductor run. The drawing offers no applicable exception or approved alternative. Which concern must be resolved?

• AWhether a larger conductor reduces voltage drop enough to permit the route
• BWhether a downstream feeder breaker protects the entire upstream service run
• CThe disconnect location relative to the conductor entry
• DWhether an outdoor emergency disconnect is automatically the service disconnect

A 2023 NEC design proposes six service disconnects in one ordinary panelboard enclosure and relies only on the old phrase "six-disconnect rule." What is the sound review response?

• AApprove because any six handles in one enclosure always qualify
• BReject because no service may ever use multiple disconnects
• CCheck the permitted separation and enclosure arrangement
• DApprove if the six devices have equal ampere ratings

A service uses 3/0 AWG copper ungrounded conductors. The supplied copper GEC schedule is: service 1/0 AWG→6 AWG; 2/0 or 3/0→4 AWG; 4/0 through 350 kcmil→2 AWG. A conductor runs directly from the service to a qualifying metal underground water-pipe electrode. A separate branch serves only a rod and need not exceed 6 AWG. Which pair gives the minimum scheduled sizes for water pipe/rod?

• A6 AWG /6 AWG
• B2 AWG /6 AWG
• C4 AWG /6 AWG
• D4 AWG /4 AWG

An approved overhead-service detail requires 10 ft clearance above a pedestrian-only area for the stated voltage and conditions. The lowest conductor point under maximum design sag is 9 ft 8 in. How much additional clearance is needed?

• A2 in
• B4 in
• C8 in
• DNo increase, because the attachment point exceeds 10 ft