UL 98-2016 pdf download
UL 98-2016 pdf download.Enclosed and Dead-Front Switches.
6.11 Disconnecting means of the grounded service conductor
611.1 An enclosed switch shall be provded with a means for disconnecting the grounded service conductor from the load conductors provided that it is acceptable for use as service equipment and that it has provisions for the connection of a grounded service conductor,
6.11.2 The required disconnecting means may be:
a) A link, screw, or similar conducting piece intended to make connection between two terminals,
b) A terminal plate provided with wire connectors or lugs or with wire binding screws and upturned lugs for clamping a 10 AWG (5.3 mm2) or smaller wire,
C) A single stud provided with wire connectors or lugs, or with nuts and cupped washers for clamping a 10 AWG (5.3 mm2) or smaller wire.
d) A wire connector that is intended for the connection of a single conductor and also for the connection of two conductors, or
e) A single wire connector between the grounded load conductor and the grounded service conductor, as well as the connection of the grounding electrode conductor, provided ttie grounded load conductor can be removed without disturbrng any other conductors.
6.11.3 Where the disconnecting means is a removable link or a switching neutral pole, the provisions for connection of the grounding electrode conductor and the main bonding jumper shall be on the line side of the disconnect link or switching neutral pole.
6.12 Provision for grounding
Note: The grounding and bonding terms used in this section are in accordance with the UL column in Annex 0. The corresponding Canadian Electrical Code. Part I and ANCE terms are also provided.
6.12.1 An enclosed switch acceptable for use as service equipment shall have provision for connection of the grounding electrode conductor to the grounded service conductor terminal. The size of the grounding electrode conductor shall be in accordance with Table 12. A soldering lug or other connection means that depends upon solder shall not be used.
6.13 Provision for bonding
Note: The grounding and bonding terms used in this section are in accordance with the UL column in Annex 0. The cosresportding Canadian Electrical Code. Par? I and ANCE terms are also provided.
6.13.1 The bond between the installed equipment grounding conductor and the conductive paris of the frame or enclosure shall comply with the requirements 01 613.2 — 6.13-8.
6.13.2 When an insulated neutral is provided for an enclosed switch that is acceptable for use as service equipment, a main bonding jumper shall be provided to bond the enclosure to the insulated grounded circuit conductor (the insulated neutral) of an ac circuit.
6.13.3 The bonding jumper shall have a cross-section area as indicated in Table 12.
6.13.4 If an insulated neutral is provided, the construction shall be such that when the bonding means is not used, the spacings given in Table 2 will be obtained.
6,13.5 Unless the intended use and method of installation of the bonding means are obvious, such means shall be accompanied by instructions for installing.
6.13.6 If the main bonding jumper is a screw, the screw shall have a green-colored head. The screw shall be visible without disassembly or removal of devices inside the enclosed switch.
6.13.7 Screws located in the backs of enclosures and used to secure grounding conductors of nonmetallic sheathed cables shall not project past the back of the enclosure by more than 1.6 mm (0.063 inch) when a 16 AWG conductor is In place under the head of tho screw. With the maximum intended size of wire in place, the screw shall engage at least two full threads.
6.13.8 If enamels or other nonconducting protechve coatings are applied to switch enclosures, means shall be provided for securing an effective electrical bond between the grounding means and the metal enclosure.
