Random Electrical Notes

Question 1

Continuity is;

Answer 1

The presence of a complete path for current flow.

Question 2

Three phase motor is spinning in the reverse direction, how do you fix?

Answer 2

Swap any of the 2 wires

Question 3

FR. No. on plate for electric motor, what does that state?

Answer 3

Frame Number (NEMA)
standard for electric motors
indicates shaft sizes, diameters, mounting hole spacing and HEIGHT TO CENTRE OF SHAFT for any given Frame size. Centreline.

Question 4

What are transformers used for?

Answer 4

Stepping up/Stepping down voltages
i.e. High voltage power lines run through transformer to step down power to 120V before reaching house.