Mike Dolt Enterprises
Mike Dolt Enterprises
User: Trafficops, Location: Long Beach
Asked on: Sunday, May 30, 2021 at 2:41 pm EDT
Answered on: Thursday, June 20, 2024 at 11:18 am EDT
Question: How are traffic signal equipment bonded physically? Not grounded. Bonding of all metallic equipment.Where exactly does it start? What is it bonding too? Does it start at the Edison service cabinet then the 332 cabinet to the poles and signal head?I’m so confused because everything I read mentions grounding.
Physical Bonding of Traffic Signal EquipmentPurpose
To ensure electrical continuity and prevent electric shocks.
Start Point
The bonding starts at the Edison service cabinet, where the utility power enters the traffic signal system.
Bonding Path
1.
Edison Service Cabinet
The cabinet is bonded to the earth electrode system (ground rod or buried cable).2.
332 Cabinet
The 332 cabinet (traffic signal controller cabinet) is bonded to the Edison service cabinet via ground wires.3.
Traffic Signal Poles
The poles are bonded to the 332 cabinet via ground wires.4.
Signal Heads
The signal heads are bonded to the traffic signal poles via ground wires.
Bonding Material
Ground wires (typically AWG 14 solid copper) Mechanical connections (e.g., bolted or crimped)
Bonding Points
Conduit entries Exposed metal equipment surfaces (e.g., cabinets, poles, signal heads) Electrical components with exposed metal parts (e.g., bases, lamp sockets)
Importance of Bonding
Provides a low-resistance path for fault currents, preventing shocks or fires. Ensures proper operation of electrical equipment.* Protects against lightning strikes and other electrical disturbances.
Note: Grounding and bonding are related but distinct concepts. Grounding refers to the connection to the earth electrode system, while bonding refers to the electrical connection between metallic equipment to ensure a common electrical potential. Flag for review