N.Y.C. Admin. Code § 645.27: Section 645.27

Section 645.27 – Revise Section 645.27 to read as follows:

645.27 Coordination of Overcurrent Protective Devices. Critical operations data system(s) overcurrent protective devices shall be coordinated in accordance with either (A) or (B).

Selective coordination shall be selected by a licensed professional engineer or other qualified persons engaged primarily in the design, installation, or maintenance of electrical systems. The selection shall be documented and made available to those authorized to design, install, inspect, maintain, and operate the system.

(A) New Systems. Critical operations data system(s) overcurrent devices shall be selectively coordinated with all supply-side overcurrent protective devices.

(B) Modifications to Previously Approved Systems. Critical operations data system(s) overcurrent devices shall have limited level coordination with all supply-side overcurrent protective devices.