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Official UK RepresentativeLow Power Busbar System
GM is a 100 A to 400 A low-power busbar trunking system designed for industrial power and lighting distribution, built from 3 m aluminium-housing elements with aluminium or copper conductors and a hard-fixing bar joint system rated to IP55.
Low power busbar system for distributing electrical power across commercial and industrial facilities.
| Parameter | GM 100A | GM 160A | GM 250A | GM 400A |
|---|---|---|---|---|
| Rated current (In) | 100 A | 160 A | 225 (250) A | 315 (400) A |
| Insulation voltage (Ui) | 1000 V | 1000 V | 1000 V | 1000 V |
| Rated operational voltage (Ue) | 690 V | 690 V | 690 V | 690 V |
| Frequency (fn) | 50/60 Hz | 50/60 Hz | 50/60 Hz | 50/60 Hz |
| Short-circuit withstand current, 1s (Icw) | 3.5 kA rms | 6 kA rms | 12.5 kA rms | 15 kA rms |
| Peak withstand current (Ipk) | 5.25 kA | 9 kA | 18.75 kA | 22.5 kA |
| Phase resistance (R20) | 0.49 mΩ/m | 0.32 mΩ/m | 0.25 mΩ/m | 0.19 mΩ/m |
| Phase resistance (Rl) | 0.58 mΩ/m | 0.38 mΩ/m | 0.29 mΩ/m | 0.23 mΩ/m |
| Phase reactance (Xl) | 0.20 mΩ/m | 0.13 mΩ/m | 0.10 mΩ/m | 0.08 mΩ/m |
| Phase impedance (Zl) | 0.61 mΩ/m | 0.40 mΩ/m | 0.30 mΩ/m | 0.06 mΩ/m |
| Phase conductor cross-section | 25 (50) mm² | 50 (75) mm² | 75 (100) mm² | 100 (125) mm² |
| Neutral conductor cross-section | 25 (50) mm² | 50 (75) mm² | 75 (100) mm² | 100 (125) mm² |
| Aluminium housing cross-section (SPE) | 300 mm² | 300 mm² | 300 mm² | 300 mm² |
| Conductor material | Aluminium (GMA) | Aluminium (GMA) / Copper (GMC) | Aluminium (GMA) / Copper (GMC) | Aluminium (GMA) / Copper (GMC) |
| Protection degree | IP55 | IP55 | IP55 | IP55 |
| Standard element length | 3000 mm | 3000 mm | 3000 mm | 3000 mm |
| Lighting fixture jack current | 16 A | 16 A | 16 A | 16 A |
GMA 10033 / 10035 / 16033 / 16035 / 22533 / 22535 / 40033 / 40035 · GMC 16033 / 16035 / 22533 / 22535 / 40033 / 40035
3 m aluminium-housing busbar element in P+N+E+(AL housing) and 3P+N+E+(AL housing) configurations, available with aluminium (GMA) or copper (GMC) conductors.
GMA EF41 / GMC EF41
Left-hand feed unit for supplying the busbar run; available in PEC, Clean Earth (CE) and ACK grounding variants.
GMA EF42 / GMC EF42
Right-hand feed unit for supplying the busbar run; available in PEC, Clean Earth (CE) and ACK grounding variants.
GMA EF43 / GMC EF43
3P+N+1/2 PE centre-feed unit for supplying the busbar run from a mid-span point; available in PEC, CE and ACK variants.
GMA 160FX / GMC 225FX
1000 mm flexible joint used to change direction where a rigid elbow is not practical; available in PEC, CE and ACK grounding variants.
GM 16L1 / 16L2 / 16L3 / 16L4-1
16 A plug-in tap-off jack for connecting lighting fixtures along the busbar run; standard cable length 1000 mm.
GM 16F1 / 16F2 / 16F3 / 16F4-1
16 A plug-in tap-off jack with integrated glass-fuse protection; available in PEC, CE and ACK grounding variants.
GM F32W / GM F32G
3×32 A MCB-type tap-off box for protected sub-circuit connections from the busbar run.
GM EC40
Closes the open end of a feed unit at the end of a run.
GM ALC
Covers each element joint to restore IP55 and mechanical protection.
GM SSU1 / SSU2
Hanger for fixing lighting fixtures to the busbar system.
GM SSU3
Support hanger for the busbar run; recommended spacing is 1500–2000 mm.
Full product catalogue covering all Gersan busbar trunking systems, including GM technical data, order codes and dimensional drawings.
PDF · 25.1 MBQuick reference for joining two GM busbar elements: alignment, hard-fixing bar joint tightening torque and closing the IP55 joint cover.
PDFNeed technical information?
Request datasheets, drawings and documentation for your selected busbar system.
Applications
GM provides robust, continuous power and lighting distribution for industrial environments where higher current capacity and broad accessory choice are required.
High-current lighting and power connections for production areas, workshops and high-ceiling industrial spaces requiring 100–400 A capacity.
Continuous power and lighting distribution above storage aisles, picking areas and logistics operations.
Adaptable power distribution for supermarkets, showrooms, retail units and commercial interiors.
High-current lighting and power connections for production areas, workshops and high-ceiling industrial spaces requiring 100–400 A capacity.
Engineering support
Share your current requirement, installation environment and project stage with our technical team.
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