When replacing an electric hot water tank it is important that the flexible metal conduit that runs from the electric hot water heater disconnect box does not touch any of the incoming or outgoing copper water pipes, as shown in Figure 1.
When two dissimilar metals come in contact with one another you will have galvanic corrosion. In this case it is the copper water pipe that will corrode and eventually leak.
If the flexible metal conduit does not want to stay away from touching the copper pipe, wrap the conduit and/or the copper water pipe with electrical tape at the point where it wants to touch. This will prevent the galvanic corrosion from taking place.
Figure 1 - Flexible metal conduit touching copper water pipe
- LED/Incandescent Christmas Tree Lights
- Wiring An Electric Hot Water Tank
- High & Low Voltage Cables
- Two Wires On A Breaker
- Grounding Rods & Standby Generators
- Fuse Panel Replacement
- Fuse Keeps Blowing
- Identifying Electrical Circuits
- Noisy Dimmer Switch
- Broken Bulb Socket
- CAT-5 Plenum versus Standard Cable
- Dead Batteries In Smoke Detectors
- Garbage Disposal Switches
- Painting Outdoor Breaker Panels & Meters
- How Does Smart Electrical Meter Work?
- Preventing Power Failure
- Intermittent Electrical Receptacles
- Flickering Lights
- Wiring a Light
- Changing Fuses to Beakers
- Breaker Tripping - Light Switch Is Turned On?
- 12/2 Wire On A 15 Amp Breaker
- Fuse To Circuit Panel Upgrade
- Upgrading An Electrical Service
- Change Circuit Breaker Or Split Power?
- Faulty Ceiling Fan Remote Control