Metal box for molded case circuit breaker (main breaker), surface-mounted or recessed, with knockouts for service entrance.
Tell us the reference or key specification (current, power, gauge, size), quantity and city — a technical advisor sends your quote the same business day.
The main-breaker enclosure houses a single molded-case circuit breaker as the general disconnect, in sheet steel with knockouts for the service entrance, per UL 50 / UL 50E. It mounts surface or flush and is sized by the MCCB frame: 100, 250, 400 or 630 A.
The metal main breaker box is used to house the main breaker of an installation, normally a main breaker or molded case circuit breaker (MCCB), protecting the disconnect point and facilitating service entrance entry. At TECTUL it is quoted by industrial line according to mounting type, breaker size, service entrance layout, knockouts, finish and site conditions. It is a more specific solution than an industrial metal enclosure because its purpose is to concentrate the general disconnect and not serve as a mounting enclosure for several control devices. It also differs from the three-phase distribution panel because it does not seek to distribute numerous circuits, but to contain the main protection before the panel or load. To specify it correctly, confirm whether it will be surface-mounted or recessed, cable entry and exit orientation, operating clearance, accessibility and electrical installation compliance under RETIE and NTC 2050.
| Lot data | Available specification |
|---|---|
| Type | Main breaker box |
| Described use | Molded case circuit breaker or main breaker |
| Mounting | Surface-mounted or recessed |
| Construction detail | Knockouts for service entrance |
| Commercial unit | Quotation by industrial line |
We dispatch to Bogotá, Medellín, Cali, Barranquilla and all of Colombia. Request a quote via WhatsApp for your metal main breaker box indicating breaker type, mounting and delivery city.
| Criterion | Detail |
|---|---|
| MCCB frame | The enclosure is specified for the frame: 100 · 250 · 400 · 630 A |
| Mounting | Surface (wall-mounted) or flush (recessed) |
| Knockouts | Concentric openings for service and load conduit |
| Enclosure | Sheet steel with electrostatic paint; UL 50 / UL 50E |
The main-breaker enclosure concentrates the general disconnect required as the installation's disconnecting means (NTC 2050, art. 230) and keeps the breaker operable without opening the distribution panel.
Usual concentric knockouts accept conduit from 12.7 to 50.8 mm (1/2 to 2 in) and typical sheet steel is 16 to 14 gauge (1.5 to 1.9 mm) depending on the breaker frame (manufacturer catalogs).
The price is quoted via WhatsApp according to size, mounting, breaker to be housed, finish, knockouts and quantity. TECTUL does not publish a single price for this line.
The main breaker box houses the main breaker. The three-phase panel is used to distribute several circuits after that main protection.
No. The industrial metal enclosure is more flexible for mounting control and automation; the main breaker box focuses on protecting and operating the general breaker.
Yes. The lot indicates surface-mounted or recessed options; selection depends on the wall, service entrance route and access required for maintenance.
Send reference or size of the main breaker, mounting type, cable entry and exit, installation environment, quantity and dispatch city.
It must be firmly fixed, keep operating access, protect cable entries, connect grounding/earthing and allow breaker inspection by qualified personnel.
No: enclosure and breaker are quoted separately, because the MCCB is chosen by current and breaking capacity and the enclosure by that breaker's frame and the mounting type.
Surface in exposed industrial installations or on structures; flush in finished walls where the door should sit level with the surface — internals and knockouts are equivalent.
Updated: July 22, 2026
