NPDesign Engineering, Consulting & Supply

Instead of routing individual string cables to a central combiner box, IPCs connect strings directly to a trunk bus cable that runs along the array. This eliminates combiner box hardware, reduces underground conduit runs, lowers voltage drop, and cuts total connection points dramatically — resulting in less labor, less material, and fewer potential failure points.

UL 9703 was developed specifically for wiring harnesses in distributed generation systems. It requires more aggressive testing — including freeze cycles, thermal chamber, wet high-pot, and impact tests — than UL 486, which covers a broader range of general-purpose connectors. It's the highest standard available for solar EBOS connections.

Our IPC product line covers trunk bus sizes from 1/0 AWG through 1000 KcMil, with tap cable support for #10, #8, #6 AWG. Available in single-tap and dual-tap configurations to match your array string count and inverter layout.

An IPC connects string-level DC wiring to a trunk bus cable by piercing through the cable insulation with tin-plated teeth. This eliminates wire stripping in the field, reduces connection time, and creates a sealed, weather-resistant joint. The result is fewer failure points and faster array commissioning.

NPDesign engineers and delivers EBOS infrastructure for utility-scale solar projects, with a strong focus on Solar IPC trunk bus systems, connectors, engineering support, and project-specific kitting and logistics.

An IPC connector is an insulation piercing connector designed to create a field-installed electrical tap connection without requiring wire stripping at the tap point. NPDesign presents IPC connectors as a faster and more efficient solution for solar trunk bus systems.

NPDesign IPC connectors are designed to install in under two minutes per tap. That faster install time helps crews move more efficiently across the array while keeping the process simple and repeatable.

The IPC product line covers trunk bus sizes from 1/0 AWG through 1000 KcMil, with tap cable support starting at #10, #8, #6 AWG depending on the model. This gives project teams options across a wide range of utility-scale solar layouts.

An IPC trunk bus system can reduce connection points, simplify array wiring, and lower field labor compared with more traditional DC wiring layouts. It reduces voltage drop and helps create a cleaner, more standardized installation process across large solar projects.

NPDesign provides both products and engineering support. That includes site plan review, single-line review, IPC sizing, array layout support, field guidance, and other services that help customers apply the right EBOS solution to the project.

Yes. NPDesign can kit connectors, trunk cable, harnesses, and accessories by site zone and construction schedule. This helps crews receive materials in a more organized way for the work being done on site.

UL 9703 is a photovoltaic connector standard that supports safety, inspection confidence, and project compliance. Using listed components can also help give developers, EPCs, and contractors more confidence in the connection system being installed.

The process starts with sharing the site plan and single-line diagram. From there, NPDesign reviews the EBOS requirements, develops the connector and trunk bus approach, and helps move the project toward kitting, delivery, installation, and energization.

Customers can reach out through the contact and quote request options on the site, and NPDesign also lists in**@*********lc.com as a direct contact email.