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Electrical (16000-16999)

832034 PROVIDE AND INSTALL 14/16 TRAFFIC CONTROL CABLE LF

DE · 2025 Standard SpecificationsBook pages 504–506View official source ↗

GROUNDING SECTION 833

494 SECTION 833 — GROUNDING

833.1Description.

This work consists of providing and placing electrical grounding equipment.

833.2Materials.

A.Stainless Steel Hardware Section 1039

B.Ground Rods

1.Underwriters Laboratories Approved.

2.3/4-inch Diameter.

3.10-feet long, Minimum, Unless Otherwise Specified.

4.Copper -Clad Steel.

5.Approved Clamps for Connecting the Grounding Conductor to the Ground Rod.

833.3Construction.

Provide certified test reports verifying the ground resistance of each ground or ground grid when installed. 833.3.1 Ground Rods.

A.Provide and place ground rods with a minimum 3/4 -inch diameter and 8 -feet of embedment into

undisturbed soil at the locations indicated in the contract. Measure the ground resistance of each rod before connecting the rod to the grounding conductor. Ensure that, if the measured resistance exceeds 25 -ohms, in accordance with the National Electric Code, exothermically weld a 10 -foot extension to the top of the first rod and drive to its full depth. Measure the earth resistance again. Contact the engineer for d irection if the measured resistance still exceeds 25 - ohms. Exothermically weld the ground rod and joining ground wire after successful testing. Paint the weld and exposed cable with 2 coats of insulating varnish.

B.The engineer may direct the use of a grounding grid where rock is encountered, and the

contractor cannot achieve an acceptable earth ground by driving as described above. Exothermically weld direct buried rods end -to-end to bond lighting standards and s tructures in a continuous series to a point where the contractor can obtain an acceptable ground.

C.Maintain continuity of the equipment grounding system throughout the project. Make

connections to equipment grounding systems using suitable lugs at all grounding bushings specified, and at the ground lugs in lighting or traffic signal structure access holes or in a breakaway base. Make connections to ground rods in accordance with the contract. Make connections to neutral grounding systems using grounding lugs. 833.3.2 Bonding and Grounding Junction Well. Drill holes in the junction well cover and the junction well frame. Attach a braided bonding strap to both the cover and frame in accordance with the contract to ensure proper bonding. Bond the junction well frame to the existing ground wire in the junctio n well, using a compression connector such as a C-tap. GROUNDING SECTION 833

495 833.4 Method of Measurement.

A.The Department will measure the number of 10-foot long lengths of ground rods as the number of

ground rods provided, placed, and accepted. The Department will only measure ground rods separately that are replacements or are added as singular items. The Department will not measure ground rods installed in conjunction with pole bases, cabinet bases, or metered service pedestals as the ground rods are incidental to these items.

B.The Department will measure the number of existing junction wells grounded and bonded. The

Department will not measure grounding and bonding of new junction wells as grounding and bonding are incidental to the applicable junction well pay item.

833.5Basis of Payment.

A.The Department will pay for the items at the contract unit price per each. Price and payment

constitute full compensation for providing and placing all materials. ITEM DESCRIPTION UNIT 833001 BONDING AND GROUNDING EXISTING JUNCTION WELL EA 833002 PROVIDE AND INSTALL GROUND ROD EA POLE BASES, EXTENSIONS, AND SHEETING, SECTION 834

496 SECTION 834 — POLE BASES, EXTENSIONS, AND SHEETING

834.1Description.

This work consists of constructing concrete pole bases, extensions, and sheeting.

834.2Materials.

A.Pole Bases

1.Ground rods Section 833

2.Self-Consolidating Concrete, Class B Section 1022

3.Bar reinforcement, Grade 60 Section 1037

4.Conduit sweeps Section 1062

5.Liquid Membrane -Forming Compounds for Curing Section 1045.7

B.Pole Base Extensions

1.Ground rods Section 833

2.Self-Consolidating Concrete, Class B Section 1022

3.Bar reinforcement, Grade 60 Section 1037

4.Conduit sweeps Section 1062

5.Liquid Membrane -Forming Compounds for Curing Section 1045.7

C.Pole Base Sheeting

1.Well -point system Section 906

2.Steel sheet piling Section 1032

3.Corrugated round steel tube as directed by the engineer

4.Sonotube as directed by the engineer

D.Anchor Bolts Section 1039

834.3Construction.

834.3.1 Pole Base.

A.The Department will measure the required depth of the pole hole as follows:

1.From the front of the pole base where the grade at the back of the pole is higher than the grade

in front of the pole o n slopes.

2.From the back of the pole when the grade on the back of the hole is lower than the front.

B.Do not exceed the diameter of the pole base during excavation. Construct pole base in accordance

with the contract, including placement of anchor bolts, bar reinforcement, conduit sweep, and ground rod. Refer to the Standard Construction Details for the diameter and depth of pole bases for the types of pole bases shown in the contract. Place the concrete by tremie methods in accordance with Section 610.3.4.D.2 for placement depths greater than 5 -feet from the point of

Source: Delaware Standard Specifications for Road and Bridge Construction, 2025 Edition. Pages 504–506 of 779.

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83202 9 PROVIDE AND INSTALL #8/2 WIRE UF W/GROUND LF

83300 1 BONDING AND GROUNDING EXISTING JUNCTION WELL EA