120V Busway Plug-In Units
(1-Pole Tap-Off Boxes)
Track Busway plug-in units are available in several breaker configurations depending on application and voltage requirements. Pole count refers to the number of phase conductors switched by the internal circuit breaker in the plug-in unit, not the total number of conductors present in the Track Busway.
Track Busway 1-Pole plug-in units — commonly called single-phase tap-off boxes — connect one hot conductor and the neutral to deliver 120 V line-to-neutral power from the overhead busway. These plug-in units are typically used to supply lighting circuits, receptacles, and other low-load equipment requiring standard 120-volt power.
Because these plug-in units deliver power directly from the overhead busway down to equipment below, contractors often refer to them as busway drop outlets or power drops. The modular design allows plug-ins to be installed or relocated anywhere along the Track Busway run without rewiring.
For additional information on Track Busway plug-in units and overhead busway systems, see:
For additional installation scenarios, configuration examples, and system overviews, visit the
Delivering 120V power on demand, each 1-pole plug-in unit connects to a single hot conductor and the neutral.
Designed for simplicity, these units are quick to install, easy to reposition, and ideal for flexible branch-circuit access from overhead.
Thanks to our field-selectable phasing at the busway fitting, contractors can choose the most appropriate circuit during installation—no rewiring required.
120V Plug-In Unit Specifications
These 120V 1-pole Track Busway plug-in units are designed for standard branch circuit applications, including lighting and general-purpose receptacles. The specifications below outline electrical compatibility, pole configuration, and supported NEMA devices.
| Phase | Single-Phase |
|---|---|
| Voltage | 120 |
| Pole Count (Breaker Configuration) | 1 |
| Amperage | 15A / 20A / 30A |
| NEMA | 5-20R, L5-15, L5-20, L5-30 |
Pre-installed busway fitting to easily install and move receptacles from overhead. Drop power to equipment on the floor. Floor-operable circuit breaker protection / disconnect.
SKU: Catalogue # (SKU): MD40-2-120-CB20-DC-XX-LE-G
120V Plug-In Unit Specifications
These 120V 1-pole Track Busway plug-in units are designed for standard branch circuit applications, including lighting and general-purpose receptacles. The specifications below outline electrical compatibility, pole configuration, and supported NEMA devices.
| Phase | Single-Phase |
|---|---|
| Voltage | 120 |
| Pole Count (Breaker Configuration) | 1 |
| Amperage | 15A / 20A / 30A |
| NEMA | 5-20R, L5-15, L5-20, L5-30 |
120V Busway Tap-Off Wiring Diagram
This diagram illustrates a Track Busway tap-off supplying 120V line-to-neutral power.
120V configurations are typically used for general-purpose receptacles, lighting circuits, and low-power equipment where flexible overhead access and simple circuit switching are required.
This collection includes 1-Pole Track Busway plug-in units designed to deliver 120-volt single-phase power for lighting circuits, receptacles, and other low-power equipment requiring flexible overhead access.
120V
Busway Fittings allow for either circuit, A or B, to be tapped. Pre-installed on all 120V Track Busway Plug-Ins.
This collection includes 120V 1-Pole Track Busway plug-in products such as receptacle-in-fitters, outlet boxes, and PowerDrop cords designed for flexible overhead branch-circuit power.
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2
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3
Pole count refers to the internal breaker configuration of the plug-in unit, not the physical track.
- 1-Pole tap-offs connect one hot and the neutral to deliver 120V (line-to-neutral)
- 2-Pole tap-offs connect two hots (no neutral) to deliver 208V single-phase or 240V (line-to-line)
- 3-Pole tap-offs engage all three hots and the neutral to support 208V or 480V three-phase, four-wire configurations
For example, a 3-pole plug-in may be installed on a four-conductor (3-phase, L-L-L-N) Track Busway to serve three-phase loads with a neutral present.
