<Dd> R 1 R 2 + R 1 R 3 + R 2 R 3 R 1 = R a, (\ displaystyle (\ frac (R_ (1) R_ (2) + R_ (1) R_ (3) + R_ (2) R_ (3)) (R_ (1))) = R_ (a),) </Dd> <P> which is the equation for R a (\ displaystyle R_ (a)). Dividing (8) by (2) or (3) (expressions for R 2 (\ displaystyle R_ (2)) or R 3 (\ displaystyle R_ (3))) gives the remaining equations . </P>

When is the delta connection of resistors equivalent to the wye connected resistors