Call your local utility.
A "three-phase system" is a polyphase system having three phases. The term "polyphase system" just means a system having multiple phases. If it is used by itself, "a polyphase system" doesn't mean "a three-phase system".
A two-phase system is archaic and you are unlikely to find it in use anywhere these days, so it is mainly of historical interest. A two-phase, three-wire system, consists of two phase voltages, displaced from each other by 90 electrical degrees, and a phase voltage which is 1.414 x phase voltage.A three-phase system consists of three phase voltages which are displaced from each other by 120 electrical degrees. In the case of a three-phase, three-wire, system, the line voltages are numerically equal to the phase voltages; in the case of a three-phase, four-wire, system, the line voltages are 1.732 x phase voltage.
A two-phase a.c. system is an archaic system, in which two phase voltages are generated 90 electrical degrees apart. It has nothing whatsoever to do with the US 'split phase' system that supplies North American homes. A two-phase system can be a four-wire system, or a three-wire system, and was useful because, unlike a single-phase system, it could create naturally rotating magnetic fields in induction motors. It has long been superseded by the three-phase system.
The number of Volts in a residential service drop in the US is either 120V 2 Wire, 120V-208V Network, or 120-240V 3 Wire. A 120-208V Network service is not single phase, but its 120V portion is.
In the case of PR execution, PR stands for "personnel recovery" and involves five IMDC location is performed during the support phase of the Army PR System.
In the case of PR execution, PR stands for "personnel recovery" and involves five IMDC location is performed during the support phase of the Army PR System.
In the case of PR execution, PR stands for "personnel recovery" and involves five IMDC location is performed during the support phase of the Army PR System.
In the case of PR execution, PR stands for "personnel recovery" and involves five IMDC location is performed during the support phase of the Army PR System.
In the case of PR execution, PR stands for "personnel recovery" and involves five IMDC location is performed during the support phase of the Army PR System.
In the case of PR execution, PR stands for "personnel recovery" and involves five IMDC location is performed during the support phase of the Army PR System.
In the case of PR execution, PR stands for "personnel recovery" and involves five IMDC location is performed during the support phase of the Army PR System.
During the PR execution the report of the IMDC event is transmitted.
During the PR execution the report of the IMDC event is transmitted.
IMDC location is performed during the support phase of the Army PR System execution.
During the PR execution the report of the IMDC event is transmitted.
During the PR execution the report of the IMDC event is transmitted.