Electrical Installation Inside Container Houses

The electrical installation inside container houses should adhere to principles of safety, standardization, and practicality. The specific steps and requirements are as follows:

1. Power Supply Connection and Distribution Box Installation

1. Power Supply Connection: Prioritize connecting to the nearby power grid, ensuring that the voltage (220V) and frequency (50Hz) meet equipment requirements. If using a generator, select a model with matching power and ensure stable operation.
2. Distribution Box Installation: Choose a waterproof and dustproof model with a rated current of no less than 63A to support multiple devices. The installation location should be well-ventilated and avoid damp or high-temperature areas.

2. Wiring Layout and Protection

1. Cable Selection: Use flame-retardant, high-temperature-resistant cables (such as BV or RV wires), with wire diameters determined by equipment power: 1.5mm² for lighting circuits, 2.5mm² for socket circuits, and 4mm² for high-power devices like air conditioners.
2. Identification and Insulation: Cables should be color-coded for identification, with independent insulation and sheath layers. The long-term operating temperature should be no less than 105°C, and the rated voltage resistance should be one level higher than the actual voltage.
3. Protection Measures: Protect wiring with PVC conduits or metal wire trays, avoiding high-temperature and damp areas and securing them firmly to prevent direct exposure.

3. Socket, Switch, and Lighting System

1. Socket and Switch: Choose waterproof models (IP44 or higher), installing at least 1-2 sockets on each wall. High-power devices should have dedicated sockets with proper grounding.
2. Lighting Design: Use explosion-proof light tubes, with control switches near doors. Emergency lighting should meet a luminous flux of ≥50Im, complying with the Fire Emergency Lighting and Evacuation Indication System (GB 17945—2010). For outdoor and electrical rooms, use LED three-proof lights (IP65, WF2 or higher).

4. Grounding, Leakage Protection, and Lightning Protection

1. Grounding System: The metal frame's grounding resistance should be less than 4Ω, with unpainted, rust-free grounding posts ensuring equipotential bonding. All grounding points should be clearly marked.
2. Leakage Protection: Install a 30mA residual current circuit breaker in the distribution box.
3. Lightning Protection Measures: Equip the roof with a high-quality lightning protection system, connecting it to no fewer than two grounding bars via flat or round steel. The lightning protection for energy storage systems should comply with standards such as the Technical Code for Lightning Protection of Building Electronic Information Systems (GB 50343).

5. Equipment Connection and Testing

1. Power Matching: Before connection, check if the equipment power is within the capacity of the power distribution system. High-power devices should use independent circuits.
2. Testing and Acceptance: Use a multimeter to test voltage and current, check socket and switch functionality, and verify the sensitivity of the residual current circuit breaker. Ensure no short circuits or open circuits and complete insulation testing.

Precautions: Unauthorized wiring is strictly prohibited; all operations must be performed by certified electricians. Regularly inspect wiring and equipment, and strengthen moisture-proof measures (such as using moisture-proof sockets and sealants) in damp environments.