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PAC cartridge switch feeding a water heater

The control and protection of the circuit supplying a water heater is usually done directly on the electrical panel, via a dedicated circuit breaker. However, it may be convenient to be able to control its operation in the vicinity of its installation site. This is usually the case when it is installed after the electrical installation of the house. We then use a PAC 2-pole fusible cartridge switch, ensuring the control and protection of a circuit. It is equipped with two fusible cartridges with 20 A fusion indicator and circuit opening and closing indicator. The switch switch button also gives the position indication: red (on), green (off). For safety, the power can only be closed hood and locked.

Necessary material

  • Knife to coat
  • Electrician's knife
  • Wire stripper
  • Electric drill
  • Hammer
  • Screwdriver
  • Anchors
  • Screw
  • Pontets
  • Connection dice

Embed the supply duct

Embed the supply duct

1. In any wet room, the safest solution is to embed the electrical conductors. Any recessed installation must be done with ducts (or ducts) that receive the conductors. The gray duct used here is very practical because it hinges and cuts easily, lending itself to the path that we want to follow (led ICO or ICT ringed gray). Any recessed installation assumes the prior completion of a groove that receives the conduit. Bring the conduit and conductors to the desired location, relock the kerf, and trim the wall around the conduit exit.

Connect the drivers to the domino

Connect the drivers to the domino

2. Cut the duct flush with the wall. Connect the ground wire (yellow and green) to the same color wire from the water heater, using a splice (or domino). The flexible cable of the device comprises three conductors, two of which (blue and red, respectively corresponding to the neutral and the phase) for the supply. Strip them with an electrician's knife or wire stripper. To ensure the isolation of the assembly, the switch is fixed on a wooden base. You will easily build this base with four rods and a few points. Drill a hole in the upper rod to keep the drivers moving. Drill two more holes at the corners to secure the base to the wall.

Connect the conductors to the switch

Connect the conductors to the switch

3. Connect the wires to the terminals of the switch by tightening the screws tightly. Secure the base against the wall with two long screws. Drill beforehand with an electric drill and dowel the holes.

Fix the switch

Fix the switch

4. Be sure to install the switch board in the correct direction: the location of the flooded fuse cartridges must be at the bottom.

Place the fusible cartridges

Place the fusible cartridges

5. Place the fusible cartridges in their housing after reassembling and screwing the switch cover. The cartridge, made of an insulating material, is calibrated so as to break the contact if the maximum permissible intensity is exceeded. Grilled fuses must be replaced. A colored LED indicates the position (open or closed) of the switch.

Nail the bridges

Nail the bridges

6. Nail the fasteners (plastic bridges) to secure the multichannel power supply cable to the water heater. He must be well tense. Connect the circuit to the electrical panel. Set the switch to the on position. Attention, never turn on a water heater without water supply!

On the same topic

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    • How to install a time switch and an off-peak relay?
  • Questions answers
    • Should you stop a water heater when you are away for a long time?
  • Forum
    • Connection of 2 water heaters

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