We recommend to never use an extension cord to connect your dishwasher to an electrical outlet. Yes, using an extension cord will work, but it's extremely dangerous. Your power cord will eventually overheat, causing your cord and anything surrounding the cord to melt.
Correct Plug Type
Most heavy-duty household appliances, such as geysers and dishwashers, use 15-amps three-prong cord. The center prong is the ground plug which prevents electric shock by a device that has short-circuited or loose wire inside it. The cord you buy for your dishwasher must have three prongs.
Safety Considerations
The biggest concern with using an extension cord to power a refrigerator is using the wrong cord, which can lead to overheating of the cord, damage to the appliance and increased risk of fire or electric shock. Never try to plug a three-pronged appliance into an un-grounded extension cord.
So, in summary, the answer is YES...you can use a power strip for both the dishwasher and solenoid.
The revised language in the NEC allows a built-in dishwasher to have a cord length between 3 feet and up to 6.5 feet. The receptacle for a built-in dishwasher should be located next to the space occupied by the dishwasher according to new item 6.
According to the electrical code, the dishwasher should be on its own circuit. The dedicated dishwasher circuit can't supply any other appliances, lights, fixtures, or outlets. In addition, the circuit that is servicing the dishwasher also needs to have a circuit breaker with at least 15-amps.
422.16(B)(2) Built-in Dishwashers and Trash Compactors. The receptacle for a built-in dishwasher shall be located in the space adjacent to the space occupied by the dishwasher.
However, the main difference between the two lies in the purpose: If you want to multiply the number of electrical outlets from a single source, use a power strip. If you want to stretch out a power source towards a distant appliance, use an extension cord.
Extension cords and power strips are not to be used together. Power strips are also commonly called Surge Protectors or Relocatable Power Taps (RPT's) although there are some differences in their capabilities.
Whole House Surge Protection – This device is intended to protect your home's “white goods” – washer, dryer, stove, refrigerator, freezer, dishwasher and HVAC units. The SPD (Surge Protection Device) is installed at the electrical Meter or main electrical panel.
Extension cords can overheat and cause fires when used improperly. Overheating is usually caused by overloading or connecting appliances that consume more watts than the cord can handle. Damaged extension cords can also cause fires. Extension cords should only be used temporarily.
The best size extension cord for a refrigerator is 14 gauge awg. This will carry up to 15 amps of current over a distance of 30 feet without any issues. It is not recommended to use a smaller size than that as it could cause a voltage drop in the cord, causing the cord to heat up and harm the refrigerator.
Extension Cords with High Wattage Appliances
Certain high wattage appliances should not use an extension cord when possible (check the owner's manual). Using an extension cord on these appliances could cause excessive heat and voltage drop, this could damage the appliance or motor.
The dishwasher circuit needs to be dedicated to 120/125-volt. A 14/2 NM wire is fed into this 15-amp circuit. You can also feed the dishwasher with a 20-amp circuit using 12/2 NM wire.
The dishwasher's hot (black) and neutral (white) wires are the ones going into each wire nut from the left side.
Drill a 3/4-inch hole in the back of the right side of the cabinet where the dishwasher is being installed. Sand the edge of the hole smooth with medium-grit sandpaper. Run the dishwasher wire through the hole and into the wiring junction box.
Can you plug one extension cord into other extension cord? The answer is no; you should not plug an extension cord into another extension cord. Doing so is downright risky. While you can power the gadget for the time being, but in the longer run, it will pose a lot of problems.
Only use one socket extension lead per socket and never plug an extension lead into another extension lead. Use an extension lead with multi sockets rather than a block adaptor (those blocks of plastic with many sockets on them). This will put less strain on the wall socket.
Nightlights pose the risk of electric shock when used outdoors or in locations that may become wet, such near sinks or hot tubs, or in garages or covered patios. They should never be plugged into an extension cord, surge-protector strip, multiple-outlet strip, or other movable types of receptacles.
When it comes to plugging your appliances into power strips, a surge protector is safer than an extension cord. Surges can occur for any number of reasons, including lightning strikes and faulty wiring.
The higher amperage cords are used for the more heavy duty equipment. Higher amperage cords are often necessary to carry power longer distances. Surge protectors differ from extension cords in a variety of ways. You may find surge protectors that give you extra length and extension cords with surge protection.
An extension cord (US), power extender, drop cord, or extension lead (UK) is a length of flexible electrical power cable (flex) with a plug on one end and one or more sockets on the other end (usually of the same type as the plug).
Dishwashers are hardwired. They consume a relatively high amount of power, so it is not advised to use the same method to connect your other household appliances.
Kitchen dishwashers installed in dwelling units require GFCI protection whether hard wired or cord and plug connected. Code Change Summary: A new subsection was added regarding dwelling unit kitchen dishwashers. Now, outlets that supply dwelling unit kitchen dishwashers must have GFCI protection.
Another revision to GFCI protection in the 2020 NEC is to section 422.5(A) dealing with appliances that require GFCI protection. This section was revised to include dishwashers. Yes, dishwashers!