Powered by a 3-phase, 4-pole AC induction motor, the Roadster can go 130 mph and does 0-60 in about 4 seconds, all completely silent. Last night Tesla Motors unveiled their uber-chic Roadster, ...

A second option, as shown in Fig. 3 (click here to see Fig. 3), is a wye-wye connected transformer system. Here, the primary neutral must be available. With this system, you can use 2,400V, ...

Panelboards — Since 1975, panelboards supplied by a 4-wire, delta-connected, 3-phase system must have the high-leg conductor terminate to the “B” phase of a panelboard [408.3(E)]. Section 408.3(F)(1) ...