different. Where Type SE cable was used to supply ranges and dryers, the branch circuit was required to originate at the service equipment to avoid neutral current from downstream panelboards being imposed on metal objects, such as pipes or ducts. Test the dryer for proper operation and you're done. A gas dryer has either a natural gas or propane gas connection point in the rear of the dryer, and the electrical service does nothing more than operate the motor that spins the dryer compartment. These appliances plug into dedicated 240-volt electrical outlets designed especially for dryers. When you convert from the 3-prong to the 4-prong configuration, you must make sure that the dryer's neutral terminal is not connected to the case ground. The exception to 250.140 applies only to existing branch circuits supplying the appliances specified in 250.140. In newer installations, the dryer outlet has four slots, with two "hot" slots, a neutral slot, and a grounding slot. And this outlet is designed to fit newer dryers equipped with four-prong power cords. Plugging in a cord sends 240 volts of electricity to the bare wire ends of the cord. For example, a new dryer may come from the factory with a newer four-prong cord, which you will need to replace with a three-prong cord.
With the power off, plug the dryer into the wall outlet and turn the breaker back. Also, all newly installed dryer receptacles must now be 4-slot.
To do this means following a procedure similar to this project, but in reverseremoving the 4-prong cord and installing a 3-prong cord. Changing a dryer cord from a three-prong to a four-prong (or vice versa) is an easy project for most people. This is a safety measure that provides a true neutral pathway to the circuit, in addition to the grounding pathway. Legally, you are allowed to continue using older three-slot dryer outlets, but you will need to convert the dryer to a three-prong cord if it doesn't have one. The heat for the appliance is provided by gas. The supply circuit is 120/240-volt, single-phase, 3-wire; or 208Y/120-volt derived from a 3-phase, 4-wire, wye-connected system. The grounded conductor (neutral) of newly installed branch circuits supplying ranges and clothes dryers is not adult dating in Islington permitted to be used for grounding the noncurrent-carrying metal parts of the appliances. Phillips screwdriver, nut driver or socket wrench (as needed). It's a different matter for dryers in which the air is heated by electricity.
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