# Interconnection Reference > Interconnection Reference: A neutral reference on the interconnection of distributed energy resources and inverter-based resources. It is part of the Testing Reference family, a set of sites that share one datum store and link to each other rather than republish. Every fact on the site is a datum that cites its source. The site paraphrases facts and does not reproduce standard text, tables or acceptance values; the named standard governs. ## Page families - Standards (6): https://www.interconnectionreference.com/standards/ - catalog facts for each standard: designation, edition, status, publisher and scope ## Datum model - The site holds 120 published datums. A datum is one sourced fact: an id (case-sensitive, for example std.ieee-1547-1.definition.clearing-time), a one-sentence statement, a kind, the subject page it belongs to, and a source block (designation, edition, clause, publisher, source class and catalog link). - Each datum carries review_status (unreviewed, software_reviewed, human_reviewed, published), provenance_status, confidence, verified_on and a change history. - Every datum has a permalink at https://www.interconnectionreference.com/data// and an index at https://www.interconnectionreference.com/data/. - Acceptance values from licensed standards are withheld, and material under an editorial or license hold is never served by the pages, the API or the MCP server. ## How to look things up - Subject pages live at https://www.interconnectionreference.com/// (lowercase, trailing slash); each family hub lists its pages, and https://www.interconnectionreference.com/sources/ lists every cited source. - Corrections: https://www.interconnectionreference.com/corrections/ (log) and https://www.interconnectionreference.com/contact/ (form). Changes: https://www.interconnectionreference.com/changes/. ## Machine access - Sitemap: https://www.interconnectionreference.com/sitemap.xml - Full page list: https://www.interconnectionreference.com/llms-full.txt - Read API (JSON, key-free at a low per-IP rate, keyed for higher limits, CORS open for GET): https://www.interconnectionreference.com/api/v1/ - API: https://www.interconnectionreference.com/api/v1/pages (optional family, limit, offset) - API: https://www.interconnectionreference.com/api/v1/pages// - API: https://www.interconnectionreference.com/api/v1/datums?family=&slug= - API: https://www.interconnectionreference.com/api/v1/datums/ - API: https://www.interconnectionreference.com/api/v1/sources - API: https://www.interconnectionreference.com/api/v1/search?q= - API: https://www.interconnectionreference.com/api/v1/nec-adoption/ - OpenAPI description: https://www.interconnectionreference.com/api/v1/openapi.json - MCP server (Streamable HTTP, JSON responses, no authentication): https://www.interconnectionreference.com/mcp - MCP tool search: full-text search over pages and datums (query) - MCP tool get_page: one page with its article and datums (family, slug) - MCP tool get_datum: one datum by id (id) - MCP tool list_sources: every cited source - MCP tool nec_adoption: NEC edition in force (state, USPS code or name) ## The Testing Reference family - Electrical Testing Reference: https://www.electricaltestingreference.com/ - A neutral encyclopedic reference on electrical power-equipment testing: test methods, standards, equipment, instruments, certification and terminology. - Testing Reference: https://www.testingreference.com/ - The family index of the Testing Reference sites: one page per site, the shared glossary and the standards catalog. - Fiber Optic Reference: https://www.fiberopticreference.com/ - A neutral reference on optical fiber cabling and its testing, and the cabling standards that govern it. - Insulating Fluid Reference: https://www.insulatingfluidreference.com/ - A neutral reference on insulating liquids: mineral oil, esters and silicone; sampling, tests and acceptance. - Grounding Reference: https://www.groundingreference.com/ - A neutral reference on grounding, bonding and earth resistance measurement. - Battery Testing Reference: https://www.batterytestingreference.com/ - A neutral reference on stationary battery testing and maintenance. - Power Quality Reference: https://www.powerqualityreference.com/ - A neutral reference on power quality and harmonics. - Protective Relay Reference: https://www.protectiverelayreference.com/ - A neutral reference on protective relays and their testing. - Electrical Maintenance Reference: https://www.electricalmaintenancereference.com/ - A neutral reference on electrical maintenance programs and maintenance intervals. - Test Instrument Reference: https://www.testinstrumentreference.com/ - A neutral reference on electrical test instruments and their calibration. - NEC Adoption Reference: https://www.necadoptionreference.com/ - The National Electrical Code edition in force in each US state and territory, from public records. - Transformer Testing Reference: https://www.transformertestingreference.com/ - A neutral reference on transformer testing. - Switchgear Testing Reference: https://www.switchgeartestingreference.com/ - A neutral reference on switchgear and switchboard testing. - Circuit Breaker Reference: https://www.circuitbreakerreference.com/ - A neutral reference on circuit breaker testing. - Motor Testing Reference: https://www.motortestingreference.com/ - A neutral reference on rotating machinery testing. - Revenue Metering Reference: https://www.revenuemeteringreference.com/ - A neutral reference on revenue metering and instrument transformers. ## Terms - Machine-use terms: https://www.interconnectionreference.com/machine-use/ - License: https://www.interconnectionreference.com/license/ - How to cite: https://www.interconnectionreference.com/cite/ - Attribution is required. No bulk republication of the site text or of API or MCP output as a dataset; rate limits apply. - The standards cited are not the site's property and are not licensed by any output of the site. - Attribution: cite as "Interconnection Reference" with the page or datum URL. Cite the governing standard for the fact.