The exact details of the connections will differ from appliance to appliance, it will depend on how the terminal block inside the dryer is wired. When 240/120V appliances are connected without the fourth equipment grounding conductor, the connections are done such that the dryer's metal frame is bonded to the neutral (white) wire. There is a simple principle that determines how you'll make the connections. BUT, please make sure the spade terminal is straight and the bare metal is well clear of the terminals on the left and right, you do not want to create a short. There is no "definitive" answer, or standard hookup You have to follow the manufacturer's instructions but the manufacturer has dropped the ball if they have contradictory instructions out there. This is labeled "GFCI Protected / No Equipment Ground". If it is infeasible to retrofit a ground, you can change the receptacle to 4-prong anyway, wire the appliance for 4-prong anyway (meaning: isolate neutral from ground, very important!), and then use a 2-pole GFCI breaker to feed it. If your installation is old and uses a legal cable type (/3 noground or SE), then it's legal to retrofit a ground from the socket to anywhere that has a #10 or larger ground back to the panel - water heater, grounding electrode wires, any metal conduit, or back to the panel. That will give you a separate neutral and ground. You are really, really better off upgrading to 4-prong receptacle and plug ASAP. or they are using a cable type that was always illegal (/2 + ground NM or UF). However in my experience many installations either have a 3-wire receptacle needlessly because they actually do have ground behind the receptacle. So it is leeeegal to jumper the appliance chassis to the neutral wire and then call it a day. and loose connections are unlikely since these plugs and wiring are rarely disturbed. as long as there aren't any loose connections. The concept is that neutral is supposed to be safe.
What they are actually doing is connecting chassis to the live neutral.
It's only legal on a legacy basis, with certain cable types because the appliance industry complained and moaned that they'd lose appliance sales if it was outlawed. There is no way to make a 3-wire connection safe.
0 kommentar(er)
