UL 891 listed service equipment
Suitable for use as service equipment under UL File E529270.
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1200A Switchboard
UL 891 listed enclosed switchboard, suitable for use as service equipment. 480Y/277 VAC, 3-phase, 65 kA SCCR, with twelve 125A molded-case branch breakers on bolted dead-front construction.
Part number BS1200x12D100_UL891_M1
Rev. 1.0
- Equipment Type
- Enclosed Switchboard — Service Equipment
- Listing
- UL 891 Listed — Suitable for Use as Service Equipment
- UL File
- E529270 (BITSINK LLC)
- Supply Voltage
- 480Y/277 VAC, 3-phase, 4-wire + ground, solidly grounded wye, 60 Hz
Integral Arc Reduction Maintenance System
Main breaker's ARMS function lowers incident energy during live maintenance.
Residual ground fault protection
Integral GFP per NEC 230.95 with LSIG trip functions on the main device.
Active thermal management
Filtered forced-air cooling with adjustable thermostat, 40°C activation setpoint.
Bolted dead-front construction
No hinged doors — bolted covers per UL 891 switchboard convention.
Factory documentation package
BOM, single-line, layout drawings, GFP test instructions, and FAT report included.
General Specifications
| Equipment Type | Enclosed Switchboard — Service Equipment |
|---|---|
| Listing | UL 891 Listed — Suitable for Use as Service Equipment |
| UL File | E529270 (BITSINK LLC) |
| Supply Voltage | 480Y/277 VAC, 3-phase, 4-wire + ground, solidly grounded wye, 60 Hz |
| Service Rating | 1,200 A |
| Max Combined Continuous Load | 960 A |
| SCCR | 65 kA RMS symmetrical @ 480 VAC |
| Enclosure Type | UL / NEMA Type 1 — indoor, general purpose |
Service Disconnect & Main OCPD
| Device | Noark M6N1200E3, 3-pole MCCB |
|---|---|
| Frame / Interrupting Rating | 1,200 A frame, 600 VAC max, 65 kA @ 480 VAC |
| Trip Unit | LSIG (long-time/short-time/instantaneous/ground fault) |
| Arc Reduction | Integral Arc Reduction Maintenance System (ARMS) |
| Ground Fault Protection | Integral residual GFP per NEC 230.95 |
Bus, Neutral & Grounding
| Main Power Bus | 1/4 in × 5 in silver-plated copper, 3-phase |
|---|---|
| Neutral Disconnect Link | 1,250 A, installed — isolates neutral for insulation testing |
| Main Bonding Jumper | 1/4 in × 5 in silver-plated copper, dedicated per NEC 250.28 |
| Equipment Ground Bus | 1/4 in × 2 in copper, UL-listed, rated for 100 kA short-circuit withstand |
480 VAC Branch Circuits
| Branch Devices | 12 × Noark M2H125T3L, 125 A, 3-pole MCCB, 100 kA @ 480V |
|---|---|
| Combined Continuous Load | Limited to 950 A; branch positions expandable within bus capacity |
Active Thermal Management
| System Type | Active forced-air, filtered intake/exhaust |
|---|---|
| Cooling Fans | (4) × 39 CFM, 120 VAC, axial |
| Control | Adjustable thermostat, 0–60°C range, 40°C activation setpoint |
Enclosure Construction
| Type Rating | UL / NEMA Type 1 — indoor, general purpose |
|---|---|
| Front Access | Marked per NEC 230.66 |
| Cover Bonding | Bolted dead-front covers (no hinged doors) |
Standards & Markings
| Equipment Standard | UL 891 — Switchboards |
|---|---|
| Field Marking | Available fault current label per NEC 110.24; arc-flash label per NFPA 70E |
| Branch Breaker Standard | UL 489 listed molded-case circuit breakers |
| Documentation | BOM, single-line, layout drawings, GFP test instructions, FAT report |
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