Md. Code Regs. 20.50.09.07 - Certified and Approved Equipment

A. After January 1, 2024, any small generator facility inverter for which an interconnection request is submitted shall be deemed certified and approved if it meets the requirements of IEEE Standard 1547-2018 and UL Standard 1741-SB, except for inverters purchased pursuant to Regulation .06N(2) of this chapter.

B. After January 1, 2024, any small generator facility shall be deemed approved if the interconnection equipment including interface components such as switchgear, multifunction relays, or other interface devices are compatible with the interconnection equipment, pursuant to witness test requirements pursuant to Regulation .06L of this chapter.

C. An electric utility shall approve a meter collar adapter model for installation in its Maryland service area for specific compatible meter configurations and customer applications, provided that the meter collar adapter model meets the following criteria:

(1) The meter collar adapter model is approved or listed by a nationally recognized testing laboratory;

(2) The meter collar adapter model is approved for use in utility service areas, unless sufficient rational for disapproval is provided by an electric utility;

(3) All meter collar model installations, access, testing, inspections, servicing, and removals shall only be performed by a qualified person as agreed between the utility and the meter collar manufacturer;

(4) The meter collar adapter model design does not impede access to the sealed meter socket compartment, or to the meter itself by a qualified person;

(5) The meter collar adapter model is compatible with the National Electric Code; and

(6) The meter collar adapter model is compatible to the specific meter configurations and customer applications to ensure that the meter collar adapter is capable of being safely and reliably inserted into a meter socket to maintain a secure connection with both the meter socket and the utility meter.

D. An electric utility shall approve or disapprove a meter collar adapter model for installation in its service area no later than 90 days after a meter collar manufacturer submits a request for approval of the meter collar adapter, and a utility's procedures shall be updated within 90 days of utility approval.

E. An electric utility shall provide an explanation to the requesting meter collar manufacturer explaining the reasons any meter collar adapter model application was denied.

F. A requesting meter collar adapter manufacturer may appeal the utility decision to the Commission using the dispute resolution process in Regulation .13 of this chapter.

G. An electric utility shall provide public notice of all decisions approving a meter collar adapter model by posting the information on the utility's website.

H. An electric utility shall authorize the installation and operation of a utility-approved meter collar adapter for a customer installation, provided the meter collar adapter meets the following criteria:

(1) The meter collar adapter is qualified to be connected to the supply side of the service disconnect, pursuant to the applicable provisions of the National Electric Code;

(2) The meter collar adapter is rated for the meter socket into which it is intended to be installed;

(3) The meter collar adapter does not exceed the weight bearing limits of a meter socket;

(4) Multiple meter collar adapters are not stacked in a meter socket; and

(5) The meter collar adapter does not disable this excessive heating detection capability of AMI meters.

I. A utility shall uninstall an approved meter collar adapter in the aggregate if any deficiencies are found after installation that result in safety or operational concerns, if these concerns cannot be remediated by a customer for a specific installation or by a meter collar adapter manufacturer, in the aggregate.

J. The determination of violations in this regulation and the assessment of related civil penalties and corrective action plans shall be delegated to the Engineering Division.

Notes

Md. Code Regs. 20.50.09.07

Amended effective 47:8 Md. R. 436, eff. 4/20/2020; adopted effective 51:24 Md. R. 1082, eff. 12/12/2024.