Overhead distribution pole construction in Korea covers erecting poles and other supports for overhead distribution lines, reinforcing them with guy wires, and building the pole-top configuration (cross-arms and insulators) to suit the site. Supports are the backbone of the whole line, so a single error in embedment depth, anchor position or guy tension can compromise the line’s stability. This guide covers three stages — pole setting, guy wires and cross-arm work.
Contents
- Common Pre-Work Review
- 1. Pole Setting
- 2. Guy Wire Installation
- 3. Cross-Arm and Pole-Top Work
- NCS Criteria for Supports and Cross-Arms
- FAQ
- Reference Standards
- Summary
Common Pre-Work Review
Before work, review the design documents, the method statement (quality test, environmental, material supply and safety plans), the road occupancy permit and KEPCO design standards and field manuals. Prepare an aerial bucket truck for live-line work, a come-along (wire puller) and an auger crane, plus a laser distance meter and buried-utility locator, as well as an engineering calculator, camera, radios and a voltage detector. Workers wear hard hats, safety vests, safety shoes, insulating gloves and harnesses. Key materials are pole anchors (근가), U-bolts, guy grips, guy insulators, anchor rods, guy wire, bands and insulators.
1. Pole Setting
- Contact the landowner and relevant agencies to agree the pole location.
- Dig trial holes at planned excavation points to check for buried utilities; where positions are unclear, use a locator to find water, sewer, gas and telecom lines.
- Excavate to the standard embedment depth for each pole size, and increase embedment where weak ground does not give enough foundation strength.
- Install the pole anchor (근가) taking its position and direction into account.
- Backfill after setting the pole, and clear surplus soil and tidy the area.
- Where vehicles may strike the pole, fit a reflective pole marker plate.
On weak ground, lay gravel or crushed stone at the bottom to prevent settlement, and install shoring where collapse is a risk.
2. Guy Wire Installation
- Secure the labor, equipment, tools and vehicles needed.
- Install guy wires suited to the site, considering the strength and stability of the support.
- Check and measure the guy anchor for each support to set the position and direction of the guy hole.
- Check for buried utilities before digging the guy hole.
- Install the guy anchor and adjust guy tension to the required pull.
- Backfill after installation and clear surplus soil and the surrounding area.
- Fit a guy guard to protect pedestrians.
- Where site conditions make a guy wire impossible, install a push brace (strut) in the direction of tension.
3. Cross-Arm and Pole-Top Work
- Secure the labor, equipment, tools and vehicles needed.
- Decide the cross-arm position and installation method.
- Determine insulator positions and quantities from the conductor angle.
- Follow the line-post (LP) insulator installation method exactly so vibration does not loosen the insulator pin.
- Arrange low-voltage rack configurations vertically or horizontally to suit site conditions.
NCS Criteria for Supports and Cross-Arms
| Item | Criterion |
|---|---|
| Standard pole embedment | At least 1/6 of the pole length |
| Pole anchor | Usually in the direction of tension, 0.5 m below ground |
| Guy position | Close to the load point; dual guys below the low-voltage line |
| Guy bands on guy poles | Ordinary guy band above, horizontal guy band below (prevents slippage) |
| Top cross-arm | 250 mm below the pole top |
| Typhoon-prone areas | Double cross-arms every 5 spans or where the horizontal angle is 5° or more |
These values come from the considerations in the NCS competency unit. Always apply the client’s current standards, such as KEPCO distribution design standards, first.
FAQ
How deep should a distribution pole be set?
The NCS considerations give at least 1/6 of the pole length as the standard embedment. Increase it in weak ground and reinforce with gravel or shoring.
What if a guy wire cannot be installed?
Where roads or buildings prevent a guy wire, install a push brace in the direction of tension to support the pole.
What is the main point to watch with line-post insulators?
If the installation method is not followed exactly, vibration can loosen the insulator pin. Re-check the fixing right after installation.
Reference Standards
- Electricity Business Act (전기사업법) — law.go.kr
- Electrical Safety Management Act (전기안전관리법) — law.go.kr
- Electric Technology Management Act (전력기술관리법) — law.go.kr
- Electrical Construction Business Act (전기공사업법) — law.go.kr
- Occupational Safety and Health Act (산업안전보건법) — law.go.kr
- Korea Electro-technical Code (KEC, 한국전기설비규정) — law.go.kr
- KEPCO design standards; field practice manuals for transmission and distribution work; Korean Industrial Standards (KS)
- NCS competency unit Overhead Distribution Pole Construction (가공배전지지물공사, 1901070211_22v4; NCS is Korea’s National Competency Standards) — ncs.go.kr
Summary
The most common mistakes in overhead distribution pole construction are matching only the standard embedment without checking the ground, and setting guy tension by feel. Pole setting depends on utility checks, embedment and anchors; guying on tension and pedestrian safety; and pole-top work on cross-arm position and insulator fixing. For pre-construction preparation, see Distribution Line Construction Planning. A Korean version of this guide is available here.
This article restructures the Korean NCS competency unit ‘Overhead Distribution Pole Construction’ (가공배전지지물공사, code 1901070211_22v4) as a practical reference. Actual work must follow applicable standards and the judgment of qualified professionals; always confirm specific values, deadlines and criteria against the latest regulations and client standards.
Written/reviewed by VOLT · Last updated 2026-10-25