Step 1: Single Line Diagram

NFPA 70E requires up-to-date single line diagrams. This information is essential for documenting, troubleshooting and communicating information about your power systems. To meet this requirement, we can conduct a comprehensive site survey that will be used to update your existing single line diagrams or complete any unfinished electrical system drawings.

NFPA 70E (2012)

205.2: Revised to require single-line diagrams be kept in a legible condition and reflect current electrical system conditions.

120.2(F)(1)(a): Revised by indicating that the employer is responsible for providing an effective means for locating “all” sources of energy when up-to-date drawings are not available.

” Locating Sources. Up-to-date single-line drawings shall be considered a primary reference source for such information. When up-to-date drawings are not available, the employer shall be responsible for ensuring that an equally effective means of locating all sources of energy is employed.”