You may also like
ABB TLMQ Series Convertible Load Center, 125A Copper Bus, NEMA 1
The ABB TLMQ Series is part of the ReliaHome T-Series convertible load center line, shipping as a main lug unit with the capability to accept a main breaker for added flexibility on the job. Built with a 125A copper bus and housed in a NEMA 1 indoor, combination/flush enclosure, this load center is rated up to 60/75°C and is suitable for use with service entrance equipment when installed in accordance with electrical code. The TLMQ Series is available across a range of space/circuit configurations — 6 Spaces / 12 Circuits, 8 Spaces / 16 Circuits, and 14 Spaces / 28 Circuits — so electricians can match the panel to the job while every configuration shares the same 125A copper bus, 120/240V AC single-phase 3-wire rating, 22 kAIC interrupt rating, and UL listing.
Key Features
- Convertible Design: Ships as main lug only, with the capability to install a main breaker for future flexibility.
- Bus Rating: 125A copper bus delivers reliable current-carrying capacity for residential and light commercial distribution across the entire TLMQ range.
- Space/Circuit Range: Offered in 6 Spaces / 12 Circuits, 8 Spaces / 16 Circuits, and 14 Spaces / 28 Circuits configurations, with room for 1" breakers depending on model.
- Electrical Rating: 120/240V AC, 1 phase, 3-wire configuration for standard single-phase service.
- Interrupt Rating: 22 kAIC interrupt rating supports demanding fault-current conditions.
- Enclosure: Indoor combination/flush enclosure rated NEMA 1 for protected indoor installations.
- Temperature Rating: Rated up to 60/75°C, suitable for use with service entrance equipment when installed per code.
Certifications & Compliance
- UL Listed (Standard: UL)
- Suitable for Use with Service Entrance Equipment When Installed in Accordance with Electrical Code
Technical Specifications
- Interrupt Rating: 22 kAIC
- Configuration: NEMA 1 Enclosure
- Standards: UL
- Space/Circuit Options: 6 Spaces / 12 Circuits, 8 Spaces / 16 Circuits, 14 Spaces / 28 Circuits
Typical Applications
- Residential and Commercial Electrical Distribution
- Service Entrance Equipment Installations
- Load Center and Panelboard Upgrades
- Convertible Main Lug to Main Breaker Projects
- Indoor Panel Installations Requiring NEMA 1 Protection
Why ABB?
ABB load centers combine a durable copper bus, a 22 kAIC interrupt rating, and UL listing to deliver dependable, code-compliant electrical distribution across the full TLMQ space/circuit lineup. The convertible main lug/main breaker design gives electricians flexibility on the job while the NEMA 1 indoor enclosure keeps installations protected, making the TLMQ Series a solid choice for professional electrical work regardless of which configuration is selected.
Manufacturer Resources
Spec Sheet
Product Specs
- Product Type:
- Load Center
- Amperage Rating:
- 125A
- Voltage Rating:
- 120/240V
- Configuration:
- NEMA 1 Enclosure
- Listing:
- UL Listed
- Standards:
- UL
- Department:
- Electrical
- Product Group:
- Power Distribution
- Product Material:
- Copper
- Product Subgroup:
- Panelboards & Load Centers
ABB TLMQ612RCU – Frequently Asked Questions
1) Does the ABB TLMQ load center ship with a main breaker, or is it main lug only?
The TLMQ Series ships as a main lug only unit. It is a convertible design, so you can add a main breaker later if the job needs one. If you want a factory main breaker out of the box, this is not that panel, plan on ordering the conversion kit breaker separately.
2) What sizes does the ABB TLMQ panel come in?
Three configurations: 6 spaces / 12 circuits (TLMQ612RCU), 8 spaces / 16 circuits (TLMQ812RCU), and 14 spaces / 28 circuits (TLMQ1412CCU). All three run the same 125A copper bus. The circuit counts double the space counts because the panel accepts tandem breakers in those spaces.
3) Can I use the TLMQ as a service entrance panel?
Yes, it is suitable for use as service entrance equipment when installed in accordance with the electrical code. It is UL Listed and rated 120/240V AC, single phase, 3-wire, which is the standard residential and light commercial service arrangement. Bus is 125A, so the service ahead of it has to be sized to match.
4) Can the ABB TLMQ load center be installed outdoors or in a wet location?
No. The enclosure is NEMA 1, which is indoor only, protected locations. For an exterior wall, a meter socket combo, or anything exposed to rain you need a NEMA 3R rated enclosure instead. The TLMQ is a combination flush/surface indoor cabinet.
5) Can I use the TLMQ as a subpanel fed from a main panel?
Yes, that is the most common use for a main lug only panel. Feed it from a breaker in the upstream panel sized at or below 125A, and keep the neutral and ground separated in the subpanel with the bonding screw removed. As a subpanel it does not need the main breaker conversion at all.
6) I need more than 14 spaces and a bigger bus than 125A. What should I use instead of the ABB TLMQ?
Step up to the Square D Homeline 60-space, 120-circuit 225A convertible main lugs load center in a NEMA 1 enclosure. The ABB TLMQ tops out at 14 spaces / 28 circuits on a 125A copper bus, so a large-panel service or a heavy sub-feed is outside its range. The Homeline unit keeps the same convertible main lugs approach and the same NEMA 1 indoor enclosure, so the install concept does not change, only the capacity and the breaker line it accepts.
7) What is the Square D equivalent to an ABB TLMQ load center for a small indoor panel?
The closest peer is the Square D QO convertible main lugs load center, which like the ABB TLMQ ships as a main lugs unit that can accept a main breaker and uses a NEMA 1 indoor enclosure. The QO unit is a plug-on neutral design, where the neutral connection is made at the breaker mounting rail rather than by a pigtail to the neutral bar, so it pairs with QO plug-on neutral breakers. The ABB TLMQ carries a 125A copper bus at 120/240V, so match the bus amperage you need when cross-shopping.
8) Can I put Square D Homeline or QO breakers in an ABB TLMQ load center?
No. The ABB TLMQ accepts ABB/ReliaHome T-Series breakers sized for its bus; Homeline and QO are separate Square D breaker lines that belong in Square D Homeline and QO enclosures respectively. Because all three are 120/240V single-phase convertible main lugs panels in NEMA 1 cans, they look interchangeable on the shelf, but breaker interchange is set by the manufacturer's listing, not by the enclosure. Order breakers from the same line as the panel you install.
9) Does the ABB TLMQ have a copper or aluminum bus?
Copper bus, rated 125A. That matters on spec jobs where the drawings call out copper bus explicitly, and it is reflected in the CU suffix on all three part numbers (TLMQ612RCU, TLMQ812RCU, TLMQ1412CCU).
10) Does the ABB TLMQ take tandem or half-size breakers?
Yes. Each version doubles its circuit count over its space count, 6 spaces to 12 circuits, 8 to 16, and 14 to 28, which is what you get using tandem breakers in the available spaces. Breakers are 1 inch, and how many tandems a given model accepts depends on the model.
11) For an outdoor meter-main or wet location, is the ABB TLMQ the right panel?
No. The ABB TLMQ uses a NEMA 1 indoor combination/flush enclosure, which is intended for protected indoor installations only. The Square D Homeline 225A and QO convertible main lugs units in the same class are also NEMA 1, so they are not outdoor alternatives either. For an exterior wall or a damp location, specify a rainproof enclosure type rather than any of these three.
12) What is the difference between the ABB TLMQ and the Square D QO plug-on neutral load center for an AFCI or GFCI heavy job?
Both ship as convertible main lugs panels in a NEMA 1 enclosure. The Square D QO unit is plug-on neutral, so QO combination AFCI and GFCI breakers land their neutral through the mounting rail and no pigtail has to be landed on the neutral bar, which cuts wiring time when most of the circuits are protected devices. The ABB TLMQ is a ReliaHome T-Series panel with a 125A copper bus, 120/240V single phase 3-wire, and a 22 kAIC interrupt rating. If the panel is mostly standard branch circuits, the wiring difference matters less.
13) Will this panel fit between studs for a flush wall mount?
The TLMQ uses a combination enclosure, meaning it can be installed either flush in a finished wall or surface mounted. That is the same cabinet either way, you just choose the trim approach on site.
How fast can I get the ABB TLMQ612RCU delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the ABB TLMQ612RCU come with a warranty?
Absolutely. The ABB TLMQ612RCU is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the ABB TLMQ612RCU?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the ABB TLMQ612RCU from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.