Independent electrical sourcing

100 amp sub panel

Electrical Panel Sourcing is an independent sourcing partner for US business buyers of electrical panels and load centers. A 100 amp sub panel is one configuration inside that family, not a warehouse SKU and not a promise that we manufacture or list the interior. Share the bus rating, main breaker or main lug choice, circuit spaces, enclosure NEMA type, quantity and destination so factories can answer the same brief.

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Indoor load center with feeder entering a sub panel, illustration only
Application illustration only. Not a completed project, factory identity, or listing evidence.

What separates a 100 amp sub panel from neighbouring load-center options

The number on the bus is the headline, not the request. A main breaker load center, a main lug sub panel, an outdoor rated load center, a monitored smart electrical panel and a meter main combination panel can share a similar ampere number and still differ in interior, enclosure height, listing scope and accessories. Those differences stay the buyer’s decision; factories cannot infer them from amperage alone.

Item to confirm What you provide
Supply Rated voltage, phase and frequency the interior must accept
Load Continuous bus rating in A, distinct from interrupting capacity in kA
Main device Main breaker or main lug, with breaker series if a main is fitted
Environment Indoor, outdoor or washdown location and NEMA enclosure type
Interface Flush or surface mounting, terminals, and conductor size in AWG

Interrupting capacity and short-circuit current rating belong on the model datasheet, not as a family-wide number copied from another interior. Selective coordination, trip curve choices and arc-flash studies stay with your licensed designer. We restate gaps; we do not sign those conclusions.

Who buys this family, and what the request must contain

Project buyers

Work from a device schedule. A 100 amp sub panel on that schedule still needs enclosure type, mounting and breaker family before a factory quote is comparable. Delivery is requested timing, not a published lead-time table.

Panel builders

Need interiors that accept the breaker series already stocked. Classified breakers are in or out of scope only when you say so. We will not substitute a neighbouring form to close a price gap.

Distributors

Need repeatable ratings, packaging and quantity breaks. Catalog labels on this site are inquiry options, not inventory counts.

Facility teams

Need a feeder panel that fits an existing knockout pattern and grounding arrangement. Replacement is equipment supply only; field replacement and energization are outside this service.

Procurement questions before the first factory pass

Which ratings must I confirm?

State rated voltage, rated current of the bus, phase, and whether the main is a breaker or lugs. Ask the factory for interrupting capacity in kA and SCCR on the exact model. Do not mix those kA figures with the bus rating in A. Enclosure NEMA type and indoor or outdoor mounting complete the mechanical side. IP codes, if a factory mentions them, are a separate system.

Do you hold stock?

No. Electrical Panel Sourcing does not declare warehouse quantity, MOQ, or a price list. Quotes come from factories against the written configuration. Availability is whatever that reply states for the quantity and destination you named.

Are you the manufacturer?

No. This site is buyer-side coordination: requirement write-up, factory search, and comparison on one basis. Listings, markings and packaging files attach to the offered model, not to this service name.

Send a 100 amp sub panel procurement brief

Include product type, intended application, quantity with units, rated voltage and current, phase, poles, mounting, enclosure NEMA type, breaker family, destination, and requested delivery date. Factory wholesale quotes are compared on that same scope. No percentage below market is published.

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