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산업시설에서의 적절한 모터 외함 선택(Motor Enclosure Selection) - Class II, Division 2 관련 규정(법령, 법규, 기준, 규칙, 법, 근거, CODE, 코드)
NEC ARTICLE 500 — HAZARDOUS (CLASSIFIED) LOCATIONS, CLASSES I, II, & III, DIVISIONS 1 & 2 📘 [NEC Article 500 — 위험 장소 (Hazardous Locations), Class I, II, III – Division 1 & 2] 500.5 Classifications of Locations. 🔶 500.5 위험 장소 분류 (C) Class II Locations. (C) Class II Locations (클래스 2 장소) Class II locations are those that are hazardous because of the presence of combustible dust. 👉 Class II 장소는..
2025. 5. 1.
건설현장의 임시 전원 설치 허용 기간(Allowed Duration for Temporary Power Installation at a Construction Site)
NEC ARTICLE 590 Temporary Installations 590.3 Time Constraints. ARTICLE 590 임시 설치 590.3 시간 제약 (Time Constraints)(A) During the Period of Construction. Temporary electric power and lighting installations shall be permitted during the period of construction, remodeling, maintenance, repair, or demolition of buildings, structures, equipment, or similar activities. (A) 공사 기간 동안건물, 구조물, 장비의 건설, 리모델..
2025. 4. 27.
도체용 최소 정션박스 크기 산정 관련 규정(법령, 법규, 기준, 규칙, 법, 근거, CODE, 코드) (Determining Minimum Junction Box Size)
ARTICLE 314 — OUTLET, DEVICE, PULL, & JUNCTION BOXES; CONDUIT BODIES; FITTINGS; & HANDHOLES 314.16 Number of Conductors in Outlet, Device, and Junction Boxes, and Conduit Bodies. (1) Standard Boxes. (A) Box Volume Calculations. The volumes of standard boxes that are not marked with their volume shall be as given in Table 314.16(A). Table 314.16(A) Metal Boxes 🔥 표(Table 314.16(A))에서 박스 고르는 ..
2025. 4. 27.
