22. A non-continuous supervision is required for the operation of the following installations that are protected by the protective devices provided for in section 10:(a) multiple installations for which the total capacity exceeds the maximum capacity established for periodic supervision, without exceeding the maximum capacity established for non-continuous supervision as indicated in Schedule C;
(b) mixed installations which, according to section 9, require a non-continuous supervision; and
(c) refrigerating apparatus installations over 1,200 kW, operating under low-pressure with refrigerants from Group A1 or B1 even if they are included in a mixed installation requiring a more rigid supervision.