SC Heating Practice Questions - South Carolina Heating Contractor Examination Exam

Control voltage shall not exceed 150 volts nominal line-to-line; control and limit devices shall interrupt the ungrounded side; and a lockable manual disconnect with ready access shall de-energize the circuit so the burner is inoperative Controls may be taken from a 480-volt ungrounded delta with no disconnect Limit devices shall interrupt only the grounded conductor A plug-in lamp cord is an accepted lockable disconnect