C7 socket wire gives designers a smaller bulb format while preserving the custom-run flexibility contractors expect from bulk line. The 1,000-foot C7 SPT-1 spool is listed with multiple spacing and wire-color combinations for rooflines, trees, and decorative layouts.
This guide focuses on the C7 1000′ 12-36" Spacing Socket Spools and the decisions that help contractors turn its listed specifications into a repeatable field plan. For a broader purchasing framework, review How to Buy Commercial Grade Christmas Lights.
Product details to verify
- 1,000-foot bulk SPT-1 wire
- Designed for C7 sockets and compatible C7 bulbs
- The product line lists spacing from 12 through 36 inches
- Green, white, and black wire configurations are represented on the product page
- Custom cutting allows runs to follow measured architectural features
Spacing should follow the design purpose
Closer 12- and 15-inch spacing supports a more continuous roofline rhythm. Wider spacing can be useful in trees or large-scale décor where the goal is to distribute points of light through depth rather than form a straight edge. Wire color matters during daylight: green can disappear into foliage, white can suit light trim, and black can recede against darker structures.
Plan the field conditions
Build a clear specification that includes wire color, socket spacing, bulb type, cut lengths, leads, plugs, and termination method. Treat C7 and C9 materials as separate inventory families to avoid socket and bulb mismatches. Follow product ratings, electrical codes, and safe de-energized fabrication procedures.
A repeatable contractor workflow
- Define the viewing distance and desired density.
- Select spacing and wire color for each application.
- Measure and create a cut list before fabrication.
- Plan connections and circuit loads for the complete system.
- Test and label every run before it leaves the shop.
Where this product fits
This format is especially helpful for contractors who offer C7 as a distinct design tier or need custom lines for trees and architectural details. Standardization keeps the smaller format from creating unnecessary complexity in purchasing and service.
Build the full job estimate
Build the estimate from measured coverage and the exact selected spacing or pattern. Include bulbs or strands, wire, leads, plugs, terminations, controllers or accessories when required, electrical-load planning, fabrication labor, installation, removal, testing, and service stock. Saving the exact variant on the estimate prevents purchasing and field crews from treating similar-looking components as interchangeable.
Plan service, removal, and storage
Photograph completed patterns and label every run or strand group by elevation. At removal, disconnect carefully, inspect sockets and conductors, keep variants separated, and record any failures before storage. Service stock should match the original color, lens, spacing, and system family so a field repair does not introduce a visible mismatch.
Check the current configuration before ordering
Product options and ordering status can change. Use the live product page to confirm the exact variant, specifications, included components, warranty terms, and current ordering details before committing materials to a customer project. Avoid substitutions unless the design, electrical plan, and customer approval are updated together.
Review C7 1000′ 12-36" Spacing Socket Spools product details and options.
