Step 1 – Turn Off the Main Circuit Breaker
Before beginning any electrical work, switch the main circuit breaker to the OFF position to disconnect the power supply.
Guide: Installing a Secondary Circuit Breaker
This guide explains how a secondary circuit breaker was installed to distribute electricity from the main circuit breaker to multiple electrical outlets that supply power to the UPS units in the computer laboratory.
Step 2 – Prepare the Tools and Materials
Gather the secondary circuit breaker, electrical wires, screwdrivers, wire stripper, electrical tape, and other required tools.
Step 3 – Mount the Secondary Circuit Breaker
Securely install the secondary circuit breaker inside the electrical panel in its designated position.
Step 4 – Connect the Input Wires
Connect the input wires from the main circuit breaker to the secondary circuit breaker, making sure all terminals are tightened properly.
Step 5 – Connect the Output Wires
Connect the output wires from the secondary circuit breaker to the electrical outlets that will supply power to the UPS units.
Step 6 – Inspect the Wiring
Check that all wire connections are secure and that no exposed wires or loose terminals remain before restoring power.
Step 7 – Restore the Power
Turn the main circuit breaker back ON to supply electricity to the secondary circuit breaker.
Step 8 – Test the Circuit
Verify that the secondary circuit breaker is supplying power to all connected outlets and that the UPS units receive electricity properly.
Safety Reminders
- Always switch off the main circuit breaker before working on electrical wiring.
- Use insulated tools when installing electrical components.
- Tighten all terminal screws securely to prevent loose connections.
- Never touch exposed wires while the circuit is energized.
- Inspect all wiring before restoring power.
- Replace damaged wires or electrical components immediately.
- Ask your instructor for assistance if you are unsure about any electrical connection.