ELECTRICAL COMPONENTS AND MATERIALS

What device to protect apparatus and wiring from damage should a situation develop where excessive electrical current is present?

• a. Fuse

• b. Circuit Breaker

• c. Residual Current Device

• d. Isolator

What device for isolating the supply from a circuit on load in the event of an overload or short circuit fault occurring on that load?

• a. Fuse

• b. Circuit Breaker

• c. Residual Current Device

• d. Isolator

True or False: Fuses should be connected to LIVE and to NEUTRAL.

• True

• False

True or False: The rating of fuse not to exceed rating for smallest conductor in circuit.

• True

• False

True or False: The rating of fuse not to exceed mains fuse rating.

• True

• False

True or False: All fuses to be in accessible positions.

• True

• False

What type of fuse is in the figure?

• Cartridge Fuse

• High Breaking Capacity Fuse HBC Fuse

What type of fuse is in the figure?

• Cartridge fuse

• High Breaking Capacity (HBC) Fuse

A type of fuse can be either ceramic (low grade) or glass with metal end caps to which the fuse element is connected.

• Cartridge Fuse

• High Breaking Capacity Fuse HBC Fuse

What type of fuse made from high grade ceramic to withstand the mechanical forces of heavy current interruptions?

• Cartridge fuse

• High Breaking Capacity (HBC) Fuse