# Enclosures

**Citation:** RCSA § 16-280b-B11  
**Type / status:** regulation / current  
**Agency:** Connecticut Public Utilities Regulatory Authority  
**Effective:** 2025-06-11  
**Published:** 2025-06-11

(a) If enclosed, individual pressure regulating or relieving devices in series and in the same system, shall be in at least two separate physical enclosures, such that damage to one enclosure does not render any device in the other enclosure inoperable. This subsection does not apply to support or pilot devices require

## Document text

(a) If enclosed, individual pressure regulating or relieving devices in series and in the same system, shall be in at least two separate physical enclosures, such that damage to one enclosure does not render any device in the other enclosure inoperable. This subsection does not apply to support or pilot devices required to allow the operation of a pressure regulating or relieving device. (b) Equipment located in below-ground enclosures, where a malfunction could directly impact the safe operation and reliability of a Pipeline, shall be designed to continue operating normally if submerged. (c) Each Operator shall ensure that snow or ice accumulation that would significantly delay access to a Vault is removed as soon as practicable after the accumulation. 28

## Provenance

- Official: Yes
- Source: <https://eregulations.ct.gov/eRegsPortal/Search/getDocument?guid=%7BE04F6097-0000-CC1C-9D68-25A0BA411C82%7D>
- Source ID: `ct-sots-rcsa-16-280b`
- SHA-256: `353230e264b355563a870592da96891ae44466347c8b0f4e732d01ba8e8bdea3`
- Retrieved: 2026-08-12T07:07:58.041Z
- Exported: 2026-08-22T02:16:26.260Z
- Document slug: `ct-rcsa-16-280b-b11`

### Source metadata

```json
{
  "jurisdiction": "US-CT",
  "subtitle": "16-280b",
  "series": "B",
  "sectionNumber": 11,
  "secretaryFileNumber": 6446,
  "trackingNumber": "PR2023-019",
  "effectiveDateEvidence": "Secretary of the State confirmation states that the regulation became effective June 11, 2025.",
  "scopeCaveat": "This corpus contains all 117 dedicated pipeline-safety sections newly codified as RCSA 16-280b-A1 through A75, B1 through B32, and C1 through C10 by Connecticut Secretary of the State File Number 6446. The filing also amends four adjacent legacy utility provisions and repeals eleven obsolete 16-11 provisions; those actions are retained as provenance and inventory rather than mixed into the dedicated searchable corpus.",
  "applicabilityCaveat": "Applicability varies by natural-gas or petroleum-gas operator, public-service-company status, pipeline facility, master-meter or petroleum-gas distribution system, activity, waiver, and federal jurisdiction. PURA states that Connecticut has no intrastate transmission or gathering lines and that hazardous-liquid pipelines remain under PHMSA jurisdiction.",
  "incorporationCaveat": "The rules supplement and repeatedly incorporate federal pipeline requirements, generally as amended from time to time, and rely on Connecticut statutes and external standards. References are recorded without reproducing incorporated material or deciding federal preemption or facility-specific legal effect.",
  "publicationCaveat": "The authenticated final filing was posted to the Connecticut eRegulations System and became effective June 11, 2025. It is used instead of the older browse pages, some of which still display pre-2025 text and stale update labels.",
  "rights": "Official Connecticut legal and agency materials are retained with attribution and cryptographic provenance. State marks, site presentation, forms, annotations, and incorporated federal or privately authored material require separate review.",
  "rightsReviewRequired": true,
  "region": "CT"
}
```