In this activity students have to wire together an extension block, a transformer, and a lamp. Students are expected to be able to connect a number of appliances in parallel and link earth cables to a common earth. They are taught to lay out wiring clearly and work methodically.

This item teaches:

• about parallel circuits
• about the protection provided by the earth wire and fuses
• about the applications of parallel circuits
• about examples of applications of electric circuits
• about the connection of charged bodies to the earth via a conductor
• about the earthing of appliances with metal cases