What is a pole number?

The number of pole pairs (p) or number of poles for an asynchronous motor determines the motor’s synchronous speed: Two-pole and four-pole asynchronous motors are typically used for centrifugal pumps. The rotational speed of these motors can be varied using frequency inverters.

How do you find pole number?

The formula is n = 60 x f /p where n = synchronous speed; f = supply frequency & p = pairs of poles per phase. The actual running speed is the synchronous speed minus the slip speed.

How do I find my power pole number?

Power-Pole® CHARGE™ Marine Power Management Station The serial number is located on the bottom of the unit housing next to where the electrical cables connect to the main unit.

What is the bottom line on a power pole?

Utility poles consist of three distinct layers or spaces. The top layer is the supply space. The middle layer is the neutral space and the bottom layer is the communications space.

How do you know which line is the ground?

The easiest way of identifying the line/hot and load wires is to check the colors of the insulation. White and grey wires are neutral; green with yellow stripes, green and copper are ground wires, black can be line/upstream wire, red or black are load/downstream.

How do you find pole numbers?

Connect it to 60 hz power and measure speed with tachometer. Look at the nameplate. It will list the RPMs, or “no load speed” of the motor. From there, you can calculate the number of poles.

What do you need to know about utility pole identification?

In fact, developing sophisticated pole ID and numbering systems requires a working knowledge of utility poles, particularly their materials, anatomies, placements, and functions. Below are 10 expert resources that serve to explain the importance and logistics associated with utility pole identification, maintenance, and more:

What are utility pole bar code tags used for?

In their most nascent forms, these scannable utility pole bar code tags are installed in order to identify utility poles, but they’re also used to track essential information, such as the pole’s owner, maintenance history, and other valuable data.

What do the numbers on the pole mean?

This number is used to inventory the pole and keep track of its inspection, treatment and age. The first marking is the date that the pole was treated.

What is the ground wire on a utility pole?

ground wire runs the entire length of the pole. It directs any electricity on the pole safely into the earth. Primary wires are on top of the pole and usually carry 12,000 volts of electricity from a substation. Cutouts act like a fuse and open when there is a problem with the line or a section of it.