Overview#
The Thomson Quick Connect Panel (QCP) is a permanently installed generator docking station that provides a safe, code-compliant connection point for portable or rental generators. Available from 100A to 4000A with voltage options up to 347/600V, the QCP features color-coded Series 16 single-pole cam-lock receptacles (400A per connector) with self-closing NEMA 3R covers for weather protection.
The QCP is UL 1008 Supplement SB and CSA C22.2 178-12 listed. All models ship in a rust-resistant steel NEMA 3R outdoor enclosure with grey powder coating, a hinged door with locking T-handle, and wall-mount flanges for straightforward installation.
How it works#
The QCP is a connection-only device — it does not include any switching mechanism. The installation architecture is:
- Permanent wiring connects the QCP's mechanical lugs to the facility's automatic transfer switch (or directly to a load panel)
- When portable power is needed, the generator's output cables plug into the QCP's cam-lock receptacles (color-coded L1, L2, L3, Neutral, Ground)
- The existing ATS senses the generator source and handles the automatic transfer
This separation of connection and switching functions allows the QCP to be located at the most convenient point for generator access (loading dock, parking area, exterior wall) while the ATS remains in the electrical room.
Sizing guide#
| Model | Amperage | Connectors per phase | Load lugs | Weight |
|---|---|---|---|---|
| QCP-400 | 400A | 1 x 400A Series 16 | 2 per phase, #6-250 MCM | 100 lbs |
| QCP-800 | 800A | 2 x 400A Series 16 | 3 per phase, #6-350 MCM | 125 lbs |
| QCP-1200 | 1200A | 3 x 400A Series 16 | 4 per phase, #6-350 MCM | 150 lbs |
| QCP-1600 | 1600A | 4 x 400A Series 16 | Contact factory | Contact factory |
| QCP-2500 | 2500A | Multiple parallel | Contact factory | Contact factory |
| QCP-4000 | 4000A | Multiple parallel | Contact factory | Contact factory |
All models: 3-pole or 4-pole, NEMA 3R steel enclosure, 34 x 23 x 13 inches (QCP-400 through QCP-1200). Larger models use wider enclosures.
TS870 TCP option: integrated ATS + QCP#
Thomson's TS870 ATS offers an optional TCP (Transfer switch Camlock Panel) configuration that integrates cam-lock connection capability directly into the transfer switch enclosure. This eliminates the need for a separate QCP when the generator connection point can be co-located with the ATS. The TCP option is available for TS870 units from 100A to 1200A.
Our service experience#
We install Thomson QCPs alongside new ATS installations and as retrofits to existing emergency power systems in the Bay Area. The most common request is adding a QCP to an existing facility that needs portable generator connection capability for NFPA 110 load testing or disaster preparedness.
The NEMA 3R outdoor enclosure and cam-lock connectors are industry-standard for portable power — rental generator companies arrive with cam-lock cables that plug directly in. We recommend mounting the QCP within 50 feet of the designated generator parking area to keep cable runs manageable at higher amperages. For the QCP-1200 and above, verify that the designated generator spot can accommodate the cable bundle diameter and weight.