Question 1 of 10
What is the specific configuration of a NEMA 18-60 receptacle?
The NEMA 18-60 is a 4P, 4W non-grounding receptacle designed for 3-phase Wye power systems.
Question 2 of 10
In a 120/208V 3-phase Wye system, what is the expected voltage between any Line and Neutral?
In a 3-phase 120/208V Y system, the phase-to-neutral voltage is 120V, while the phase-to-phase voltage is 208V.
Question 3 of 10
Which terminal on the NEMA 18-60 receptacle is designated for the neutral conductor?
The W terminal (indicated by a vertical slot) is connected to the neutral conductor and identified by a silver screw.
Question 4 of 10
Which gauge copper wire is typically specified for a 60A branch circuit using a NEMA 18-60 receptacle?
The article specifies using #4-#6 AWG copper conductors for this 60A application.
Question 5 of 10
What is the correct procedure for the Equipment Grounding Conductor (EGC) when installing a NEMA 18-60?
The NEMA 18-60 is a non-grounding receptacle, so an EGC is not connected to the device itself, although raceways must still be grounded per NEC 250.
Question 6 of 10
When installing a 3-pole GFCI breaker for this receptacle, where does the white pigtail wire connect?
The white pigtail on a 3-pole GFCI breaker must be connected to the neutral busbar in the main panel for proper monitoring of neutral current.
Question 7 of 10
Which NEMA enclosure rating is recommended for outdoor installation of this receptacle?
A NEMA 3R rainproof enclosure is required for outdoor installations.
Question 8 of 10
How should the voltage measure between L1 and L2 on a properly wired 120/208V system?
In a 3-phase 120/208V system, the phase-to-phase (Line-to-Line) voltage is 208V.
Question 9 of 10
What is the primary function of the 'Z' terminal on the NEMA 18-60?
The Z terminal, characterized by a horizontal slot, is the connection point for L3.
Question 10 of 10
According to the article, what must be done to the neutral bar if the receptacle is installed in a subpanel?
Per standard NEC requirements, the neutral bar must be isolated from the ground busbar in a subpanel, as it is only bonded at the main service disconnect.
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