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General Provisions (00100-00999)

762Remove sharp edges in the saw cut and round the corners. Blow out the saw cut with

DE · 2025 Standard SpecificationsBook pages 539–542View official source ↗

LOOP DETECTOR SECTION 846

529 SECTION 846 — LOOP DETECTOR

846.1Description.

This work consists of providing and placing loop detectors.

846.2Materials.

B.Backer Rod, Closed Cell Section 1043

C.Conduit, Galvanized Section 1062

D.Loop Detector Section 1079

E.Tape Section 1074 .2.F

F.Heat Shrink Tubing Section 1074 .2.G.1

G.Loop Wire Section 1079.1

H.Home Run Cable Section 1074 .1.D

I.Backer Rod – 5/8-inch closed cell foam. Section 1043

J.Junction Well Splices Section 1074 .2.G

K.Splicing Kit Section 1074.2.G .3

L.PCC Patching Section 1023

M.Asphalt Production Section 1014

N.Joint Sealant Section 1042.1.B

846.3Construction.

846.3.1 Loop Wire Installation.

A.Sawcut a groove in the pavement 5/8 -inch wide and at least 3 1/2 -inches deep in accordance with

compressed air to remove loose material before sealing.

B.Install the loop detector wire using blunt tools to prevent damage to the polyethylene outer

cover.

C.Tag 1 end of a loop detector wire to indicate start with an “S.”

D.Place a 5/8 -inch backer rod on top of the wire in the saw cut as needed to secure the wire within

the saw cut.

E.The engineer may require a high voltage ground test with a 500 volts DC megger after completion

of the loop detector installation and before sealing saw cuts. If the resistance to ground is less than 100 megaohms, remedy the work.

F.Apply a sealer, and sealer accelerant or retarder, if necessary, in the saw cut, in accordance with

the manufacturer’s directions. Protect the saw cut area from traffic until the sealer has set. Place a minimum of 1 inch of sealer on top of the loop detector wire and finish flush with the pavement. Seal any drilled holes in the pavement.

G.Install 2 loop detector wires in a saw cut from the loop to the edge of the road. Extend these 2

wires from the end of the saw cut to a junction well. Twist the wires a minimum of 5 wraps per LOOP DETECTOR SECTION 846

530 foot in a parallel direction, and tape every 12-inches to 18-inches from the end of the saw cut to a junction well up to the splice.

H.Where the junction well is directly behind the edge -of-pavement, curb or sidewalk, bore a 1 1/2 -

inch rotary drill hole between the edge -of-pavement, curb, or sidewalk and the junction well, in accordance with the contract. Install loop detector lead -in wire through the rotary drill hole into the junction well and splice acc ordingly.

I.When the junction well is not directly behind the edge -of-pavement, curb or sidewalk, install a

length of 1 1/2 -inch galvanized rigid metal conduit and weatherproof fitting between the rotary drill hole and junction well, in accordance with the contract . Install the loop detector lead -in wire through the rotary drill hole, 1 1/2 -inch conduit, and junction well and splice accordingly.

J.Install the loop detector wire in a continuous manner and without splices from the junction well

through the saw cuts and through the conduit. 846.3.2 Home -run Wire Installation.

A.Refer to Sections 831 and 832 for cable installation and conduit installation specifications. Refer to

the contract for details. 846.3.3 Splicing.

A.Complete splices between the loop detector wire and home -run cable in accordance with the

contract. Solder conductors side -by-side, with the exposed copper aligned. Twist the copper clockwise to achieve a mechanical connection. Coat the splice with flux , heat with a soldering iron, and solder with a rosin core solder. Insulate each soldered connection with heat -shrink tubing.

B.Test all circuits after completing the electrical and mechanical connections and before installing the

splicing kit. Install an approved splice kit in accordance with the manufacturer’s instructions. The Department will perform a continuity test at the cabinet after application of the splicing kit.

C.Remake the splice if the splice becomes faulty within 90 calendar days after splicing. The

Department’s ITS technician will make the determination if the splice is watertight or not or if wires are crossed or mislabeled.

D.Provide an overlap of the conductor insulation of at least 1 1/2 -inches at each end of the heat -

shrink tube or the open end of the end cap of heat -shrink tubing after contraction.

846.4Method of Measurement.

The Department will measure the quantity of loop detector wire or conduit as the number of linear feet of saw cut where loop detector wire is placed, sealed, and accepted. The Department will include the length of loop wire installed between the saw cut and the junction well in this measurement.

846.5Basis of Payment.

A.The Department will pay the quantity of loop detector wire provided, placed, sealed, and

accepted at the contract unit price. Price and payment constitutes full compensation for:

1.Sawcutting and

2.providing and placing:

a.loop detector wire,

b.backer rod,

c.sealer, and

LOOP DETECTOR SECTION 846

531 d. sealer accelerant or retarder.

3.junction well splicing.

B.The Department will pay the quantity of 1 1/2 -inch galvanized rigid metal conduit detector sleeve

with loop wire provided, placed, and accepted at the contract unit price. Price and payment constitutes full compensation for:

1.Providing and placing galvanized rigid metal conduit;

2.loop wire;

3.drilling required for installation;

4.concrete or pavement patching;

5.sealing the conduit ends; and

6.internal bushings.

ITEM DESCRIPTION UNIT 846001 PROVIDE AND INSTALL LOOP WIRE 1 -CONDUCTOR #14 AWG ENCASED IN 1/4” FLEXIBLE TUBING IN A LOOP SAWCUT LF 846002 PROVIDE AND INSTALL A 1 1/2 -INCH GALVANIZED RIGID METAL CONDUIT DETECTOR SLEEVE WITH LOOP WIRE LF

LIGHTING CONTROL CABINETS SECTION 847

532 SECTION 847 — LIGHTING CONTROL CABINETS

847.1Description.

This work consists of providing and installing lighting control cabinets.

847.2Materials.

A.Lighting Control Cabinets Section 1080

847.3Construction.

A.Type M , Type P, and Type R Cabinets.

1.Provide and install all equipment necessary to provide a functioning lighting control cabinet. This

may include mounting to an existing pole or existing cabinet base.

2.Mount cabinets on concrete base.

3.Place a bead of sealant under the cabinet on 3 sides.

4.Do not seal the side with the lowest elevation to provide drainage from within the cabinet.

5.Coat bolts with anti -seize compound.

6.Bolt cabinet to base.

7.Place a bead of sealant on the outside of the cabinet on the same 3 sides as in Section

847.3.A.3, above.

8.Install photoelectrical control on the side or back of the lighting control cabinet, using a line

box (LB) conduit fitting. After installing the photoelectrical control and LB conduit fitting, seal the area around the hole in the cabinet. Photoelectrical control can also be installed inside of the cabinet behind a plexi -glass shield, if required by the contract and as directed by the engineer.

847.4Method of Measurement.

The Department will measure the quantity of lighting control cabinets as the number provided, installed, and accepted.

847.5Basis of Payment

The Department will pay for lighting control cabinets at the contract unit price per each. Price and payment constitute full compensation for providing and installing all materials. ITEM DESCRIPTION UNIT 847001 INSTALL OR REMOVAL OF POLE OR POST MOUNTED CABINET EACH 847002 INSTALL OR REMOVAL BASE OR PAD MOUNTED CABINET EACH 847003 LIGHTING CONTROL CABINET – 200 A, 277/480V EACH 847004 LIGHTING CONTROL AND DISTRIBUTION ENCLOSURE (120/240; 100 AMP) EACH 847006 LIGHTING CONTROL CABINET – 100 A EACH 847007 LIGHTING CONTROL CABINET – 200 A, 240/480V EACH

Source: Delaware Standard Specifications for Road and Bridge Construction, 2025 Edition. Pages 539–542 of 779.

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84400 1 PROVIDE AND INSTALL OPTICOM EMERGENCY PREEMPTION DETECTOR EACH

84600 1 PROVIDE AND INSTALL LOOP WIRE 1 -CONDUCTOR #14 AWG ENCASED IN 1/4”