Varley loop tests are preferred over Murray loop tests because
(1) Valley loop test can locate open circuit fault (2) Varley loop test gives higher accuracy (3) in Varley loop test provision is made for the measurement of total loop resistance instead of obtaining it from the relation R = pl/a (4) Valley loop test can locate the earth fault
(1) Valley loop test can locate open circuit fault (2) Varley loop test gives higher accuracy (3) in Varley loop test provision is made for the measurement of total loop resistance instead of obtaining it from the relation R = pl/a (4) Valley loop test can locate the earth fault