Download BASIC ELECTRICAL MATERIALS AND METHODS PART 1

Henry Mayfield Elementary
St. Tammany Parish School board
Slidell, Louisiana
Craig Hebert Engineering, L.L.C.
services. Comply with requirements of governing regulations, franchised service companies, and
controlling agencies.
G.
Coordinate installing electrical identification after completion of finishing where identification is
applied to field-finished surfaces.
PART 2 -PRODUCTS
2.1
BUILDING WIRE
A.
Description: Single conductor, copper. Solid conductor for No. 10 AWG and smaller; stranded
conductor for larger than No. 10 AWG.
B. Cross-Linked Polyethylene Insulated Wire: Conform to NEMA WC7. Provide factory-fabricated
wire of sizes, ampacity ratings, and materials for applications and services indicated. Where not
indicated, provide proper selection as determined by Installer to comply with project's installation
requirements, NEC and NEMA standards. Select from the following UL types, those wires with
construction features which fulfill project requirements:
A.
1. Type THWN:For dry and wet locations; max operating temperature 75 deg C (167 deg F).
Insulation, flame-retardant, moisture- and heat-resistant, thermoplastic; outer covering, nylon
jacket; conductor, annealed copper.
2. Type THHN:For dry and damp locations; max operating temperature 90 deg C (194 deg F).
Insulation, heat-resistant thermoplastic flame-retardant, nylon jacket; conductor, annealed
copper.
Connectors and Splices: Units of size, ampacity rating, material, type, and class suitable for
service indicated. Select to comply with Project's installation requirements.
2.2
SUPPORTING DEVICES
A.
Channel and angle support systems, hangers, anchors, sleeves, brackets, fabricated items, and
fasteners are designed to provide secure support from the building structure for electrical
components.
1. Material: Steel, except as otherwise indicated, protected from corrosion with zinc coating or
with treatment of equivalent corrosion resistance using approved alternative finish or inherent
material characteristics.
2. Metal Items for Use Outdoors or in Damp Locations: Hot-dip galvanized steel, except as
otherwise indicated. Provide NEMA 3R Housing for devices installed outdoors.
B. Steel channel supports have 9/16-inch diameter holes at a maximum of 8 inches o.c., in at least I
surface.
1. Fittings and accessories mate and match with channels and are from the same manufacturer.
A.
Raceway and Cable Supports: Manufactured clevis hangers, riser clamps, straps, threaded Cclamps with retainers, ceiling trapeze hangers, wall brackets, and spring steel clamps or "click"type hangers.
B.
Sheet-Metal Sleeves: 0.0276-inch or heavier galvanized sheet steel, round tube, closed with
welded longitudinal joint.
C. Expansion Anchors: Carbon-steel wedge or sleeve type.
BASIC ELECTRICAL MATERIALS AND METHODS
16050-2