WTEC 4S™ — Field Installation Guide
A complete DC cable and disconnect system built to simplify installation and improve field performance. Used by EPCs to reduce install time and improve cable reliability in large-scale solar projects.
01 — System Overview
A self-supporting DC cable management and disconnect solution designed for utility-scale solar. It integrates cable support, routing, and prefabricated components into one system.
The 4S™ System organizes, supports, and protects DC cables across the site. It combines messenger wire, cable management blocks, pre-terminated trunk cables, and disconnect boxes into a single integrated solution.
02 — Why 4S™
Designed around how EPCs actually install. Fewer steps, less cable damage, and layouts that pass inspection the first time.
Prefabricated components and a single integrated system reduce field steps and crew time on every run.
Controlled sag, structured routing, and retention blocks eliminate long-term cable fatigue and failure points.
Cleaner, safer layouts built to NEC 250 and NEC 690 — so inspections go faster and re-work stays rare.
03 — Installation Guides
These documents cover all phases of 4S™ installation from structural support through final electrical connections. Download any manual directly as a PDF.
Complete end-to-end installation guide covering support system, bracket installation, trunk cable routing, grounding, and electrical connections. The master reference for all 4S™ field work.
Dedicated guide for installing 4S™ Self-Supporting DC Trunk cables. Covers block installation, dead end assembly, cable sag & angle tables (15–30 ft spans), tension guidance at 80 lbs/cable, and electrical connections.
Step-by-step guide for installing the Gen 2 Cable Management Block system, including messenger wire tensioning (40 lbf), block stacking for 2-pair and 4-pair homerun configurations, and mid-span support every 2 ft.
Full installation, wiring, and grounding instructions for WTEC DB-150xx series Disconnect Boxes. Covers I-beam mounting, DC feeder connections (340 in-lbs), and NEC 250 / 690 compliance.
More installation manuals will be added here as they become available.
04 — Technical Support
Contact our engineering team for troubleshooting, warranty questions, or site-specific guidance.
05 — Legal
Certain products of WTEC Energy are protected by one or more patents in the United States and elsewhere.
This notice is provided to comply with the virtual patent marking provisions of 35 U.S.C. § 287(a).
| Product Name | Product Description | Patent Number(s) |
|---|---|---|
| 4S Product | Photovoltaic solar energy generation systems comprised of electric wire harnesses, electric cables, mounting brackets adapted for electric cables, shear bolt electrical connectors, and disconnect boxes in the nature of circuit breakers; Components for photovoltaic solar energy generation systems, namely, electric wire harnesses, electric cables, cable support brackets adapted for electric cables, shear bolt electrical connectors, and disconnect boxes in the nature of circuit breakers. | U.S. Patent Nos. 12,418,260 and 12,592,665 |
Additional patents may be pending in the United States and other countries.
For questions regarding WTEC Energy’s intellectual property, please contact:
WTEC Energy — Legal Department
Email: legal@wtecenergy.com
06 — Learn More
Explore the full WTEC 4S™ product line, technical resources, and project capabilities on our website.