Square D 999215 Molded Case Circuit Breaker
- 15A
- 2 Pole
- Bolt-On
Quantity
Square D 999215 - 15A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
The 999215 is a commercial-grade molded case circuit breaker designed for legacy Square D power distribution systems. Rated for 15 amps at 600VAC, it delivers reliable thermal-magnetic trip protection for industrial applications. This bolt-on unit installs seamlessly into vintage ML panelboards and compatible motor control centers. Featuring a specialized 2-pole configuration housed within a 3-pole frame, it provides an exact fit for older infrastructure requiring 10kAIC interrupting capacity.Specifications
| Brand | Square D |
|---|---|
| Part Number | 999215-R |
| Series | 999 |
| Amperage | 15A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D ML Panelboards, Square D Motor Control Centers |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Standards | UL 489, CSA C22.2 No. 5 |
|---|---|
| Approval | UL, CSA |
| Temp Rating | 40°C |
| Construction Features | 2-Pole in 3-Pole Housing |
Product FAQs
6 answersWhy is the 999215 breaker described as having both 2-pole and 3-pole characteristics?
The 999215 is a specialized 2-pole circuit breaker built into a 3-pole frame. This unique configuration allows it to fit properly into legacy Square D ML panelboards that require a 3-pole footprint for single-phase, 2-pole applications.
What equipment is the 999215 circuit breaker designed to fit?
This legacy breaker is engineered specifically for vintage Square D ML panelboards and compatible Square D motor control centers. It requires a bolt-on connection and will not fit in panels designed for plug-on or different bolt-on frame types.
Is the Square D 999215 still in active production?
No, the 999215 is an obsolete model from the legacy 999 series. It is maintained in inventory specifically to support and service older industrial infrastructure that cannot easily be upgraded.
What does the LI trip function code indicate on the 999215 breaker?
The LI designation means this thermal magnetic breaker includes fixed long-time and fixed instantaneous trip functions. The long-time function protects against sustained overloads, while the instantaneous function responds immediately to severe short circuits.
What is the correct installation method for the 999215 breaker?
This unit requires a bolt-on connection directly to the busbar of an ML panelboard or motor control center. Ensure the panel is fully de-energized before attempting to bolt the breaker into place.
What precautions should be taken when replacing a 999215 breaker in an ML panelboard?
Because this breaker is used in legacy 600VAC systems, electricians must verify that the panel is completely de-energized and follow proper lockout and tagout procedures before unbolting the old unit or installing the replacement.
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