A four-circuit load center rated at 100 A for single-phase 120/240 VAC distribution. It occupies the entry-level range of the QOL line, providing enough breaker positions to isolate lighting, receptacle, and dedicated appliance circuits in compact homes, rental units, and small commercial spaces.

Specifications

Model	QOL-4
Reference voltage	120/240VAC
Reference current	100A
Number of circuits	4*1″
Wiring system	1-phase
Knockout	Provide on all sides of enclosure
Connector	ALUMINUM/COPPER
Insulator	High temperature, polycarbonate
Front type	Surface/Flush
Enclosure	0.8-2.0 mm steel/galvanized steel

Model	Mount	Main Amps	Circuits	Best For
QOL1F/S	Flush/Surface	100A	1	Main disconnect or single large load (e.g., well pump)
QOL2FNT/SNT	Flush/Surface	100A	2	Small sub-panel or dual-circuit setup
QOL2F/S	Flush/Surface	100A	2	General purpose 2-circuit panel
QOL4F/S	Flush/Surface	100A	4	Garage, shed, or small apartment
QOL6F/S	Flush/Surface	125A	6	Medium home addition or workshop
QOL8F/S	Flush/Surface	125A	8	Whole-house upgrade (small home)
QOL12F/S	Flush/Surface	125A	12	Larger home or commercial tenant space
QOL16F/S	Flush/Surface	125A	16	Multi-unit dwelling or light industrial
QOL20F/S	Flush/Surface	125A	20	Full residential service or mixed-use building

Features

01/

Plug-In Breaker Design

Four QO/QOB-format breaker positions accept standard snap-in devices. The 100 A main rating supports a full set of branch circuits-lighting, general outlets, and two dedicated appliance lines-without forcing dissimilar loads onto a single breaker.

02/

Heavy-Duty Steel Construction

Stamped from 0.8–2.0 mm cold-rolled or galvanized steel, the enclosure is proportioned to support four active breakers and their conductors without flexing. The material thickness and seam geometry maintain shape integrity during transport and wall mounting.

03/

Matte Powder-Coated Finish

All exterior steel surfaces receive a baked polyester powder layer that cures to a matte appearance. The coating tolerates the humidity fluctuations common in basements, utility closets, and back-of-house commercial areas without surface rust or chalking.

04/

Spacious Interior

The wiring cavity is scaled for four branch-circuit conductor sets plus the main feeder. Each breaker station is aligned with a wire channel that maintains proper bending radii, preventing insulation damage when conductors are dressed and secured.

05/

Dual Mounting Options

Flush models recess into standard wall cavities so the cover sits even with drywall, suitable for finished hallways and kitchen pantries. Surface models attach directly to studs or masonry, providing a practical solution for garages, unfinished basements, and retrofit locations where recessing is not feasible.

06/

Multi-Directional Cable Entry

Knockouts are formed on the top, bottom, sides, and rear of the enclosure. With four active circuits, this layout allows the main feeder and branch cables to enter from separate faces, keeping the interior wiring zone organized and traceable.

07/

Grounding & Safety Compliance

Pre-installed aluminum or copper neutral and grounding bus bars provide termination points for each branch circuit. The installer selects the bus material to match the project conductor specification, ensuring compatible connections and reliable grounding continuity.

Key Applications

Mobile home park unit distribution

Community clinic and dental office branch panels

Auto repair shop tool and lift circuits

Small warehouse lighting and outlet systems

Food truck and catering trailer electrical hubs

Our Factory

We are equipped with complete distribution box production equipment and a strong technical and production team. Meanwhile, we have been continuously updating and upgrading our equipment to meet the diverse needs of customers.

FAQ

Q1: What makes the QOL4 different from the GPD4?

A: The QOL4 accepts QO/QOB-format breakers and offers a 100 A main rating with aluminum or copper bus options. The GPD4 uses a different breaker format and is rated at 60 A with aluminum connectors. The QOL4 is suited for heavier loads and breaker compatibility with North American QO systems.

Q2: Can I use this panel in a commercial garage with vehicle lifts?

A: Yes, provided the lift motor load falls within the 100 A main rating and the branch breaker is sized correctly. The panel should be installed in a dry location away from vehicle traffic. For lifts with high inrush currents, verify breaker trip curves with the lift manufacturer.

Q3: Does the aluminum bus option require special breakers?

A: No. The breaker type is determined by the bus stab format (QO/QOB), not the bus material. However, if you use aluminum branch conductors with the aluminum bus, apply antioxidant compound and torque to the panel label values. Copper branch conductors can be used with either bus type.

Q4: Why would a small warehouse need a 100 A panel instead of 60 A?

A: Warehouse loads often include high-bay lighting, conveyor systems, and multiple outlet circuits that can approach or exceed 60 A when operating simultaneously. The 100 A rating provides capacity headroom and avoids nuisance tripping during peak usage.

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