I. SOURCE OF POWER SUPPLYING FOR HOUSING
1. One phase power source: (2 wires: 1 phase line & 1 neutral/ground line):
Voltage: 220V; frequency: 50 Hz
2. Three phase power source: (4 wires: 3 phase lines & 1 neutral/ground line) Voltage:
220V/380V; frequency: 50 Hz
II. SOME POPULAR WAYS TO WIRE FOR CONSTRUCTIONS
1. Opening wiring: 1. Opening wiring: Electric wires and cables are passed through round or flat pipelines and fixed on the walls or ceilings. dẹp, được cố định trên tường, trên trần.
2. Embedded wiring: Electric wires and cables are passed through plastic pipelines (smooth lines for straight wiring or corrugated tube when corner wiring) and embedded in the walls, ceilings or floors. The pipelines must be hard, heavy-duty and anti-leakage.
3. Buried wiring: For the peripheral items (gardens, garages, swimming pools, rock gardens...) electric wire and cable are passed through hard pipelines, heavy-duty, anti-leakage and buried in the ground.
NOTE:
- Housing main lines should be distributed into several branches so that it is easy for fixing within each area
- Phase lines of the same distribution lines should have the same colors (for example red). Phase lines of different distribution lines should have different colors (for example phase lines of distribution line 1 are red, phase lines of distribution line 2 are yellow... etc...). Neutral/ground lines should be green-yellow insulation
- For your safety, you can ground-wire with green-yellow insulation to the ground rod
- When passing through in pipelines, the volumes of wires must be <75% in comparison with the pipelines area.
Wiring in a dry area with a temperature not over (>70°C).
- The connections of the wires must be tight to avoid high temperature while transmitting power
Preserving power cables
- Make sure that moisture, chemical in cement, water... not infiltration and damage the wire copper conductor.
- The wire and cable waiting for joining, the wire left over after installation, the new wire roll after unwrap should be carefully covered with end caps or use electrical tape to cover the wire end tight and carefully.