Elecricity countable and uncountable nouns

I need five meters of ___ to connect the new outlets.

• cable

• cables

The ___ is off, so we can safely work on the wiring.

• electricities

• electricity

We need to install three ___ in the living room.

• light switch

• light switches

There is too much ___ in this circuit; it’s dangerous.

• voltage

• voltages

We don’t have enough ___ to cover all the wires.

• insulation

• insulations

Can you bring me two ___ from the toolbox?

• circuit breaker

• circuit breakers

The ___ for this installation is too heavy to move alone.

• equipment

• equipments

I need a ___ to tighten the screws on this panel.

• tool

• tools

We should check if the ___ is stable before connecting the devices.

• current

• currents

There isn’t enough ___ to complete the connection between the panels.

• wire

• wires