A double pole, double throw switch has how many normally open and normally closed contacts?

A double pole, double throw switch has how many normally open and normally closed contacts?

• A. 2 normally open, 2 normally closed
• B. 1 normally open, 3 normally closed
• C. 3 normally open, 1 normally closed
• D. 4 normally open, 0 normally closed

Answer: (A)

A double pole, double throw switch has two separate switch poles, and each pole provides one normally open and one normally closed contact. With two poles, that yields two normally open contacts and two normally closed contacts in total. In one switch position, each common terminal typically connects to its NC contact, and in the other position, it connects to its NO contact, giving two different circuit paths.

A double pole, double throw switch has two separate switch poles, and each pole provides one normally open and one normally closed contact. With two poles, that yields two normally open contacts and two normally closed contacts in total. In one switch position, each common terminal typically connects to its NC contact, and in the other position, it connects to its NO contact, giving two different circuit paths.