Friday, June 18, 2010

HOW TO CONTROLL A LIGHT FROM 3 LOCATIONS.

UNIT:-    WIRING METHODS.

AIM:-      How to control a Light bulb from 3 locations?

PERFORMANCE OBJECTIVES:-   S.W.B.A.T  (Student will be able to)
  1. Define a 4 way switch.
  2. Know the applications for a 4 way switch. 
  3. Connect a light to be controlled from 3 locations using EMT raceway.
PRESENTATION:-   
  1. Motication
  2. Definitions
4 WAY SWITCH:-  It may be simply be defined as a controlling device, which main function is to provide control for a load from 3 or more locations. It consists of two (2) sets of travelers, input and output, which are to be connected in between the 3 way switches. The 4 way switch may be used for alternating power for 2 two or more loads.
SAFETY:-  Always test for power even if the fuse or circuit breaker appears to be "OFF"

Tuesday, June 1, 2010

HOW TO CONTROLL A LAMP FROM 3 LOCATIONS?

UNIT:-    WIRING METHODS.

AIM:-      How to control a lamp from 3 locations?

DO NOW:  Draw the actual & Schematic diagram for the following lay out.