52. In the case of surveying involving an electrical energy source, the authorization holder must ensure that(1) the charging and discharging circuits of the electrical seismic energy source are equipped with circuit breakers;
(2) the electrical cables of the electrical seismic energy source are protected from damage and are adequately insulated and grounded to prevent current leakage and electrical shock; and
(3) the electrical seismic energy source, when tested, is fully immersed in water.