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ترانس ، چوک
(4) Where conductors of a multi-wire branch circuit are installed, employing an identified conductor, the continuity of the identified conductor shall be independent of device connections, such as lampholders, receptacles, ballasts, etc.
Overcurrent protection shall not be provided in a high-intensity discharge luminaire or separate ballast box unless the combination is approved for the purpose and so marked.
(3) Branch circuit conductors within 75 mm of a ballast within the ballast compartment shall have a maximum allowable conductor temperature of not less than 90 �C.
(d) permanently connecting the branch circuit conductors to the terminals of a luminaire equipped with disconnecting means that will open simultaneously all conductors supplying the ballast(s) when access to ballast connections is made.
(2) Ballasts located within luminaires referred to in Subrule (1) shall be deemed to be sources of heat and the conductors supplying the luminaires shall
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