Installation Method Of Power Distribution Cabinet
Mar 28, 2026
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1. Floor-mounted installation
This is the most common method in industrial plants, power distribution rooms, and large commercial buildings, suitable for tall and heavy distribution cabinets.
Channel steel/I-beam base:
Before installation, lay No. 10 or No. 12 channel steel or I-beams on the ground, level them, and weld or fix them to the pre-embedded parts of the ground foundation. Then, hoist the distribution cabinet onto the channel steel and secure it to the channel steel with bolts.
Features: High load-bearing capacity, facilitates heat dissipation, cable trenches or pre-drilled holes allow cables to enter and exit from below, and prevents water from seeping into the cabinet.
Direct installation on concrete ground:
For lightweight cabinets, such as lighting distribution boxes or low-power control cabinets, holes can be drilled directly in the ground, and the cabinet can be fixed using expansion bolts.
Requirements: The ground must be flat, hard, and moisture-proof.
2. Wall-mounted installation
Suitable for lightweight and small-sized distribution boxes, such as residential meter boxes, lighting distribution boxes, and terminal control boxes. Ideal for locations with good wall load-bearing capacity, dry environments, and where aesthetics are not a primary concern.
Surface mounting: The distribution box is directly fixed to the wall surface. Expansion bolts are typically used to pass through the back panel of the box, or it is fixed to the wall using mounting lugs.
Concealed mounting: An opening is pre-drilled in the wall during construction or wall grooving. The distribution box is then embedded into the wall, with the panel flush with the wall surface.
When embedding into the wall, attention must be paid to the wall thickness and fireproofing requirements. The back of the box should not be in direct contact with flammable wall materials; plastering or fireproofing is usually required.
3. Recessed installation (in coordination with civil engineering):
An equipment hole is pre-drilled in the building wall, and the cabinet is embedded in the wall, with the front exposed for operation. This type of installation falls between floor-standing and wall-mounted, and is commonly used for distribution cabinets or control cabinets in large buildings.
Features: Saves indoor space and is aesthetically pleasing, but requires pre-installation and embedding during the civil construction phase, and has high requirements for heat dissipation and maintenance space.
4. Cable Tray/Bracket Installation
Utilizes columns, ceiling load-bearing beams, or cable tray hangers, and uses angle steel brackets or hangers to suspend and fix the distribution cabinet in the air. Suitable for small control boxes, field operation boxes, or machine tool electrical cabinets in industrial environments. Commonly found next to workshop equipment or on columns, allowing operators to control the equipment nearby and avoiding areas with water accumulation or debris accumulation.
Lifting: In industrial plants, some lightweight distribution boxes or operation boxes are suspended from the floor slab or steel structure beams using threaded rods or angle steel brackets.
Walkway Brackets: In cable tunnels or equipment platforms, distribution cabinets are suspended and fixed to walls or steel structures using welded brackets.
5. Outdoor Floor-Mounted Installation
Used for street light control, landscape lighting, temporary power supply, or outdoor transformer substations. In flammable and explosive environments, such as chemical plants, explosion-proof distribution cabinets must be used, and specific sealing and isolation installation specifications must be followed.
A concrete installation platform 200mm to 300mm above ground level must be poured to prevent rainwater backflow. The cabinet's protection rating typically needs to reach IP54 dustproof and splashproof or higher, and it should have a rain cap, moisture-proof, and small animal-proof measures.