Container House Circuit Layout

The circuit layout of container houses requires comprehensive consideration of electrical equipment layout, lighting, wiring, insulation, grounding, and lightning protection requirements to ensure safety and compliance.

1. Electrical Equipment Layout

The layout of electrical equipment (such as distribution boxes and energy storage devices) inside container houses must comply with national standards to avoid short circuits or electric leakage caused by overly close equipment spacing. Equipment should be fixed on dedicated brackets and kept at least 0.5 meters away from the inner walls of the container for heat dissipation and maintenance. Distribution boxes should be installed in dry and well-ventilated areas, away from water sources or humid environments.

2. Lighting System

• General Lighting: LED tri-proof lights (dustproof, waterproof, and explosion-proof) are used indoors, with an IP65 protection rating, meeting the WF2 or higher standards in the Environmental Technical Requirements for Indoor and Outdoor Anti-corrosion Low-voltage Electrical Appliances (JB/T 9536—2013).
• Emergency Lighting: An independent emergency lighting system is required, which automatically activates upon power failure, with an effective lighting duration of no less than 90 minutes and a luminous flux of ≥50 lm, complying with the requirements of the Fire Emergency Lighting and Evacuation Indication System (GB 17945—2010). Emergency lighting fixtures should be installed at key locations such as aisles and exits.

3. Wiring Specifications

• Cable Selection: Outdoor-type cross-linked polyethylene insulated flame-retardant cables with independent insulation and sheath layers are used, with a long-term operating temperature of ≥105°C and a rated insulation withstand voltage higher than the actual voltage by one grade.
• Wiring Method: Strong current (lighting, sockets, air conditioners) and weak current (network, telephone) are laid in separate troughs to avoid signal interference. Cables are fixed along the container frame or dedicated cable troughs to avoid direct contact with metal surfaces.
• Identification Management: Different functional circuits (such as live wires, neutral wires, and ground wires) must be color-coded and labeled with circuit information for easy maintenance.

4. Insulation and Grounding

• Insulation Protection: Flame-retardant insulating mats are laid in aisles, with an insulation voltage of ≥5 kV, covering all gaps between equipment cabinets and neatly trimmed.
• Grounding System: All grounding posts must be painted and rust-removed and welded to the container body at the same potential. Grounding copper bars connect non-functional conductive conductors (such as metal casings) to form a reliable equipotential network. Grounding points must be clearly marked, and lightning protection grounding is connected to the grounding bar through flat steel or round steel.

5. Lightning Protection Design

• Lightning Protection Level: If the container is outside the original lightning protection coverage area or needs to meet Class I lightning protection requirements, a separate lightning protection system must be configured, complying with the Technical Code for Lightning Protection of Building Electronic Information Systems (GB 50343) and the Design Code for Lightning Protection of Buildings (GB 50057).
• Lightning Protection Devices: A high-quality lightning protection system is installed on the roof, connected to the grounding bar through flat steel or round steel, with a grounding resistance of ≤4 Ω.