{"requirement_id":"JDDG25-14.11.7.1-G01","source":{"document":"Japan District Design Guide","version":"9.0","publication_date":"2025-04","chapter":"14","section":"14.11.7.1","title":"STEP DOWN TRANSFORMERS","page_printed":260,"page_pdf":290,"fact":"The source explains that the 2 kVA minimum supports use of readily available 20 A breakers with adequate interrupting capacity in Japan.","modality":"descriptive","strength":"guidance"},"localization_ja":{"language":"ja","title_ja":"降圧変圧器","title_status":"controlled_editorial","fact_ja":null,"fact_translation_status":"pending","modality_rendering_ja":"～である／～を示す","strength_label_ja":"指針","translation_priority":"low","translation_notes":[],"title_translation_provenance":"editorial_controlled","fact_translation_provenance":"not_translated","publication_eligible":false},"references":[],"meaning":{"engineering_basis":null,"engineering_basis_source":null,"engineering_interpretation":null,"interpretation_confidence":null},"risk":{"failure_modes":[],"failure_mode_source":"not_stated","failure_domains":[]},"quality":{"source_status":"normal","data_quality_flag":"normal"},"applicability":{"applicability_class":"informational","evaluation_mode":"not_applicable","evaluation_scope":"project","input_semantics":"none","source_condition_text":null,"trigger":null,"approval_gate":null,"exception_condition":null,"condition_provenance":"not_applicable","normalization_provenance":"not_applicable"},"lifecycle":{"primary_phase":"design","primary_phase_label":"Design","applicable_phases":["design"],"phase_links":[{"phase":"design","provenance":"jddg_cross_section_explicit","basis":"Linked to separate JDDG Section 14.8 design evidence/submittal requirements.","phase_label":"Design"}]},"responsibility":{"primary_workflow_owner":"ACT-DESIGNER-AE","primary_workflow_owner_name":"Designer / A-E","actor_assignment_status":"workflow_only","actors":[{"actor_id":"ACT-DESIGNER-AE","actor_name":"Designer / A-E","actor_class":"project_delivery","source_named":true,"relation_type":"workflow_owner","provenance":"editorial_derived","lifecycle_phase":"design","lifecycle_phase_label":"Design","basis":"Workflow owner assigned from lifecycle phase for checklist routing; not a contractual responsibility statement."}]},"verification":{"method":null,"stage":[],"acceptance_criteria":null,"evidence_required":[],"verification_provenance":"not_applicable","evidence_provenance":"not_applicable","audit_status":"informational_or_guidance","audit_confidence":"high","acceptance_provenance":"not_applicable","evidence_type_ids":["EV-PRODUCT-DATA","EV-INTERMEDIATE-ONE-LINE","EV-FINAL-DRAWINGS"],"supporting_source_requirements":["JDDG25-14.8.2.3-R04","JDDG25-14.8.3.1-R02","JDDG25-14.8.3.1-R06","JDDG25-14.8.4.1-R01","JDDG25-14.8.4.1-R03"],"source_support_scope":"design_submittal_or_analysis"},"resolved_evidence":[{"evidence_type_id":"EV-PRODUCT-DATA","name":"Major equipment product data / datasheets","source_requirement_ids":["JDDG25-14.8.2.3-R04","JDDG25-14.8.3.1-R02"],"stage":["concept_design","intermediate_design"],"source_scope":"Design analysis/detail sheets include product data and salient characteristics for proposed major equipment."},{"evidence_type_id":"EV-INTERMEDIATE-ONE-LINE","name":"Intermediate one-line / riser diagram","source_requirement_ids":["JDDG25-14.8.3.1-R06"],"stage":["intermediate_design"],"source_scope":"One-line/riser diagrams show conduit/conductor sizes, panels, breaker frame/trip values, and short-circuit ratings."},{"evidence_type_id":"EV-FINAL-DRAWINGS","name":"Final contract drawings and details","source_requirement_ids":["JDDG25-14.8.4.1-R01","JDDG25-14.8.4.1-R03"],"stage":["final_design"],"source_scope":"Final drawings contain required details and are checked for discrepancies and interdisciplinary compatibility."}],"supporting_source_requirements":[{"requirement_id":"JDDG25-14.8.2.3-R04","section":"14.8.2.3","title":"DESIGN ANALYSIS","fact":"Concept Design Analysis appendices should include product data for proposed major electrical equipment, using Japanese product data to the greatest extent possible particularly for luminaires."},{"requirement_id":"JDDG25-14.8.3.1-R02","section":"14.8.3.1","title":"DRAWINGS","fact":"Chosen systems and equipment should be detailed with dimensions, salient characteristics, and related notes."},{"requirement_id":"JDDG25-14.8.3.1-R06","section":"14.8.3.1","title":"DRAWINGS","fact":"Intermediate one-line/riser diagrams are to show conduit and conductor sizes, panels, breaker frame sizes, trip amps, and short-circuit ratings."},{"requirement_id":"JDDG25-14.8.4.1-R01","section":"14.8.4.1","title":"DRAWINGS","fact":"Final drawings should contain all details required for the final package."},{"requirement_id":"JDDG25-14.8.4.1-R03","section":"14.8.4.1","title":"DRAWINGS","fact":"Final drawings are to be checked for discrepancies and compatibility with specifications and other disciplines."}],"references_resolved":[]}