Specifications - State of Delaware

SECTION 260533 - RACEWAYS: continued
PART 2 - PRODUCTS
2.01 METAL CONDUIT AND TUBING:
A. General: Provide metal conduit, tubing, and fittings of types, grades, sizes, and weights (wall
thicknesses) for each service indicated. Where sizes, types, and grades are not specified or
indicated, provide proper selection to fulfill specified requirements, and comply with
applicable portions of NEC for raceways. Minimum size shall be 3/4 inch, unless indicated or
specified otherwise.
B. Rigid Steel Conduit: Rigid steel, zinc coated, threaded type conforming to UL 6.
1. Zinc coating fused to inside and outside walls.
C. PVC Externally Coated Rigid Steel Conduit and Fittings: Rigid Steel Zinc coated with
additional external 40 mil coating of PVC conforming to NEMA RN 1. Coating shall be
bonded to conduit (extruded coating shall not be accepted).
D. Intermediate Steel Conduit: Rigid intermediate grade (IMC) hot-dip galvanized conforming to
UL 1242.
E. Electrical Metallic Tubing (EMT): UL797.
F. Flexible Metal Conduit: UL 1. Formed from continuous length of spirally-wound, interlocked
zinc-coated strip steel. Minimum size shall be 1/2 inch unless indicated or specified otherwise.
Approved as a grounding path for circuits rated 20 amperes or less and in lengths of 6 feet and
less.
G. Liquid-Tight, Flexible Metal Conduit: Liquid-tight flexible steel conduit; construct of single
strip, flexible, continuous, interlocked, and double-wrapped steel; galvanized inside and
outside; coat with (oil-resistant,) liquid-tight thermoplastic jacket. Approved as a grounding
path in conduit sizes 1-1/4 inches and smaller and in lengths 6 feet or less when protected as
follows:
1. 3/8 inch and 1/2 inch protected at 20 amperes or less.
2. 3/4 inch, 1 inch and 1-1/4 inch protected at 60 amperes or less.
H. Rigid Metal Conduit Fittings: Threaded cast-malleable iron, galvanized or cadmium plated,
conforming to UL 514B.
1. Provide steel fittings for steel conduit.
2. Provide aluminum fittings for aluminum conduit.
I. Flexible Metal Conduit Fittings: Threadless hinged clamp type. Provide conduit fittings for
use with flexible steel conduit. Fittings shall be approved for grounding per NEC 350-5.
1. Straight Terminal Connectors: One-piece body, female end with clamp and deep slotted
machine screw for securing conduit, and male threaded end provide with locknut.
2. 45- or 90-degree Terminal Angle Connectors: Two-piece body construction with
removable upper section, female end with clamp and deep slotted machine screw for
securing conduit, and male threaded end provided with locknut.
J. Liquid-Tight Flexible Metal Conduit Fittings: Provide cadmium plated, malleable-iron fittings
with compression type steel ferrule and neoprene gasket sealing rings, with insulated or
noninsulated throat. Fittings shall be approved for grounding in conduit sizes 1-1/4 inches and
smaller per NEC.
K. EMT Fittings: Steel compression type.
L. Conduit Bodies: Galvanized cast-metal conduit bodies of types, shapes, and sizes as required
to fulfill job requirements and NEC requirements. Construct conduit bodies with threaded
conduit entrance ends, removable covers, either cast or of galvanized steel and corrosionresistant
screws.
260533-2 DEAN260533.DOC