I have a little confusion about power transmission lines. In my home town, there are 4 conductors parallel to each other coming down from the main road on steel poles. Then, on every street, two conductors are distributing power to each home. Now, the four condctors which are coming down from the road — are these are called bundled condutors (no spacers are present between them)? Are they a 3 phase 4 wire system? And also explain the conductors that are distributing power on the streets.
closed as unclear what you're asking by Marcus Müller, Olin Lathrop, Brian Carlton, Voltage Spike, Dmitry Grigoryev Jan 30 '17 at 14:35
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They are almost certainly not bundled conductors (see Electrotechnik). Those are only used on high voltage transmission lines.
They are very likely to be a 3-phase 4-wire system, with three phase (live, hot) conductors and one shared neutral. Premises that only need a single-phase supply will get a tap off one phase and the neutral.