Secondary Rack Extension Bracket
- Extends a multi-spool secondary rack out from the pole face for proper conductor spread
- 2-spool, 3-spool, and 4-spool configurations
- Hot-dip galvanized to ASTM A-123 (≥86 μm)
- Spool insulator pins pre-tapped (5/8 in standard)
Technical Specifications
| Catalog No. | Type | Extension (mm) | Bolt | Weight (kg) | Surface |
|---|---|---|---|---|---|
| RAX-SREB-2 | 2-Spool | 200 | M12 | 1.2 | HDG |
| RAX-SREB-3 | 3-Spool | 300 | M12 | 1.8 | HDG |
| RAX-SREB-4 | 4-Spool | 400 | M16 | 2.5 | HDG |
Application & Installation
Where it is used
- Pole-top secondary distribution where multiple service drops originate
- Joint-use poles separating telecom (top) from electric secondary (lower rack)
- Multi-tenant residential service from a single transformer
- Streetlight feeder distribution along a roadway
- Industrial / commercial parking lot lighting circuits
Installation sequence
- Position the rack at the secondary elevation per drawing (typ. 3–5 ft below primary crossarm).
- Through-bore the pole at 9/16 in (M12) or 11/16 in (M16) for the mounting bolt.
- Install the bracket with a square washer on the back side.
- Thread spool insulators onto each pre-tapped pin.
- Route the secondary conductors around each spool and clamp per project standard.
Buyer’s Guide: Secondary Rack Extension Bracket
1. When Do You Need a Secondary Rack Extension Bracket?
A secondary rack extension bracket supports multiple secondary conductors at the customer-service elevation on a distribution pole. The 2-spool variant carries a typical residential service (120/240 V split-phase: two hots + neutral on the pole’s primary side, with the third spool on a separate bracket below if needed). The 3-spool handles three-phase 208/480 V wye services. The 4-spool covers four-wire systems with separate neutral and groundedequipment conductors.
Each spool position is pre-tapped 5/8 inch for an ANSI-standard porcelain spool insulator — we supply matching spools at order time. The 100 mm pin spacing matches industry-standard tie-down geometry; if your project specifies different spacing (often 75 mm for compact installations or 125 mm for heavy-conductor commercial), we punch to a custom pattern at the same tooling lead time.
2. How to Choose the Right Size
Pick by service-drop conductor count.
- RAX-SREB-2 — standard 120/240 V residential split-phase (most-ordered)
- RAX-SREB-3 — three-phase 208/480 V commercial
- RAX-SREB-4 — four-wire systems, multi-tenant + separate neutral
Custom configurations (5/6/7 spool positions, non-standard spacing) available with 5–7 day tooling, 200-piece minimum.
