UL 48-2018 pdf free download

UL 48-2018 pdf free download.Electric Signs.
4.4.2.7 An uninsulated live part in the secondary of a Class 2 circuit may be accessible in a sign intended for installation in a dry location.
4.4.2.8 An uninsulated live part in the secondary of a Class 2 circuit may be accessible in a sign intended for installation in a damp or wet location sign if the output of the Class 2 supply does not exceed 15 Vac rms/21 .2 Vpeak and 30 Vdc.
4.4.2.9 Uninsulated live parts connected to isolated, low voltage Class 2 circuits not exceeding 30 Vac/42.4 Vpeak and 60 Vdc for dry location products and not exceeding 15 Vac/21.2 Vpeak and 30 Vdc for damp and wet location products may be accessible.
4.4.2.10 A current carrying part located in a secondary circuit having a source of supply marked Class 2, with a maximum open circuit voltage of 15 Vac, 21.2 Vpeak and 30 Vdc is not required to comply with enclosure and accessibility requirements in this standard.
4.4.2.11 A current carrying part located in a secondary circuit having a source of supply marked Class 2, with maximum open circuit voltage of greater than 15 Vac, 21.2 Vpeak, or 30 Vdc is required to comply with accessibility requirements when the sign is designated for use in wet locations and is not required to comply with enclosure requirements in this standard.
4.4.2.12 All dead metal parts of a LED illumination system shall be bonded to the equipment ground of the power supply circuit in accordance with 4.2.4, noting in particular 4.2.4.1.3(g).
4.4.3 Outlet box connected (canopy signs)
4.4.3.1 A sign weighing 22.7 kg (50 Ibs) or less and intended for outlet box mounting shall be provided with means for mounting to an outlet box, such as a strap or crossbar not more than 38-mm (1-1/2-in) wide, or with one or two pairs of holes or keyhole slots for mounting the sign directly to an outlet box.
4.4.3.2 A supporting strap or crossbar shall be secured to the sign by two or more fastenings, and shall not be less than 1 .35-mm (0.053-in) thick when of steel or 1.91-mm (0.075-in) thick when of other metal.
4.4.3.3 A supporting strap that is reinforced by flanges along the edge shall be minimum 1.0-mm (0.040-in) thick, when of steel and 1.4-mm (0.055-in) thick, when of other material.
4.4.3.4 A canopy sign weighing more than 22.7 kg (50 Ibs) and intended for outlet box mounting shall be provided with means for support that is independent of the outlet box and shall comply with the mounting test in 5.6.
4.4.3.5 A canopy sign weighing more than 4.5 kg (10 lbs) shall be provided with a means to access the splice connections without removing the sign from its mounting means.UL 48-2018 pdf free download.