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Surge Protection: Primary surge suppression shall consist of a wall or flush mounted unit with 12 AWG terminals with a maximum 80kA (8/202s), protecting lines L -N, L -G, L -L, and N -G. The unit shall meet the following environmental requirements; 1. Ambient temperatures of -402F to 1852F (-402C to 852C working) and 95% RH (non - condensing). Dimensions shall be 4.5"H x 2.9"W x 2.3"D; 2. A nine -outlet (seven switched, two un -switched) rack mounted surge suppressor unit shall be installed. The maximum surge current shall be 84kA with a load current of 15A or 20A at a working voltage of 120V 50/60Hz; 3. A 19" DIN rail kit assembly shall be installed and have enough space for 32 modular surge suppressor devices (RJ11, RJ45, or BNC connector type) attached, meeting the following criteria: ambient temperature of -402F to 1852F (-202C to 852C working) and 95% RH (non -condensing). Dimensions shall be 5.04"H x .99"W x 2.25"D j) Common Grounding System: A floor mounted 12 -position ground bar is to be provided with the cabinet. 7.9.5 Outer Cabinet Construction The cabinet shall contain R-4 insulation to control the effect of environmental conditions. Cabinet shall be of 1/8", 5052 Aluminum construction with white powder coat finish to eliminate rusting. Outer door shall have NEMA 3R rated with neoprene gasketing for maximum equipment protection and shall have heavy-duty 3 -point hardware. All hinges shall be 1/8" aluminum with a stainless steel piano hinge, or continuous door length stainless steel hinges. 7.9.6 Inner Cabinet (NEMA 4) Construction The cabinet shall be a NEMA 4 rated cabinet with approximate dimensions of 20"W x 24"H x 12"D. The cabinet shall be constructed of 16-guage stainless steel or other non -corrosive material. The cabinet shall contain one 12-guage mounting plate with 10"-32" x 2" treaded hole pattern mounted to the rear of the cabinet. The cabinet shall contain one heat sink mounted to the outside rear of the inner cabinet tangent to the mounting plate. 7.9.7 Device Cabinet Base Install device cabinet base that provides an environmentally secure enclosure to house fiber optic splice closure, fiber optic drop cable slack, data cable slack, and power cable slack. The base shall be specifically fabricated to accommodate the detector cabinet as specified within this Section A268. Neoprene gasketing shall be supplied by the device cabinet base vendor that shall be applied by the installation contractor between the base and the detector cabinet. The device cabinet base shall meet or exceed the following minimum requirements: a) Outside dimensions shall be approximately 16"H x 40"W x 24"D or 16"H x 24"W x 24"D; b) Shall be fabricated from 1/8" aluminum; c) Shall have an epoxy powder coating; d) Shall have a front access panel with captive stainless steel screws; e) Shall have an open top and open bottom, each with a 2" lip for mounting and/or attachment of the detector cabinet; f) Shall have a conduit mounting plate of same size (width and depth), made of 1/4" stainless steel 316. g) All screws and hardware shall be stainless steel. 7.9.8 Base Plate All bridge pedestals shall have the existing open cable raceways sealed. These raceways shall be sealed by way of 1/4" stainless steel plates, anchored over the raceway by way of epoxy anchor drilled into the pedestal at a minimum depth of 11/4". There shall be two sizes of base plates, 18" x 12" and 10" x 10". The Contractor shall install the engineer's system manager supplied base plates where noted and/or depicted within the plan set. 7.9.9 Hub Cabinet Type VI (Master Hub Cabinet) 39