Middle Atlantic 4in. in. MPR 15A DUPLEX MODULE - M-15A

Middle Atlantic M-15A 15A Duplex Rack Power Module

Overview

The Middle Atlantic M-15A is a single-circuit, 15-amp duplex power module designed for integration into Middle Atlantic's MPR (Modular Power Raceway) always-on power distribution systems. If you're building or expanding a rack-mounted AV, security, or network equipment enclosure and need to add a discrete 15A outlet position without committing to a full power strip, the M-15A slots directly into the MPR chassis to deliver configurable, always-on power right where the equipment sits. The M-15A (often searched as M 15A) is a field-tested, modular approach that keeps power distribution organized and expandable without over-engineering the installation.

This module is sourced from Middle Atlantic's rack power lineup — a well-established name in rackmount infrastructure used across security operations centers, broadcast facilities, and enterprise IT closets. For integrators specifying rack power distribution for a phased buildout, the modular format means you only populate what you need today and add capacity later without rewiring the chassis.

Key Features

• 15A / 120VAC Rating: Handles a full 15-amp circuit at 120VAC — sufficient for most rackmount network switches, NVRs, access control panels, and AV receivers. A single 15A circuit covers the typical 1,200–1,440W load window, which is realistic for a mid-density security rack without UPS-heavy loads.
• Dual 5-15R Receptacles: Two standard NEMA 5-15R outlets on a single module position give you two device connections from one MPR slot. For a rack with four or five MPR positions, that translates to eight to ten outlets without reaching for a secondary PDU — keeping cable management cleaner and load accounting straightforward.
• Single-Circuit Architecture: With one circuit feeding both outlets, load balancing is simple — what draws on outlet A and outlet B totals against the same 15A breaker. This matters when pairing high-draw devices; know the combined draw before populating both receptacles on the same module.
• Configurable Power (Always-On): Designated as an MPR always-on module, the M-15A delivers continuous power regardless of master switching state — correct for devices like NVRs, managed switches, or access control hardware that must stay live even when peripheral loads are killed. This isn't a switched outlet; plan accordingly when building mixed always-on and switched rack zones.
• 4-Inch Depth (10.2 cm): The 4 in. depth fits within the MPR chassis footprint without encroaching into adjacent equipment airspace. Shallow-depth racks or wall-mount enclosures with limited rear clearance can accommodate this module without conflict.
• ETL Recognized: ETL Recognition from Intertek confirms the module has been tested to applicable UL safety standards — the same benchmark electrical contractors and AHJs reference when inspecting rack power installations. Not a cosmetic cert; it's the compliance document that keeps the installation defensible during inspection.
• MPR Modular Integration: Designed to populate Middle Atlantic MPR always-on module positions. This is not a standalone PDU — it requires an MPR chassis. The modular architecture means adding or swapping outlet configurations in the field without replacing the entire distribution unit, which matters on long-term rack contracts where client loads evolve.

Integration & Compatibility

The M-15A is purpose-built for Middle Atlantic MPR power distribution chassis. If you're specifying rack accessories for a new security operations build or upgrading an existing enclosure, confirm your MPR chassis model accepts always-on duplex modules in the target slot positions — not all MPR configurations support the same module mix. The 5-15R receptacle type is standard North American 15A, so any NEMA 5-15P–equipped device (most rack-mount NVRs, switches, intercoms, and access controllers in the under-15A draw range) connects directly without adapters.

For power distribution planning across multi-rack deployments, consider mixing M-15A always-on positions with switched module variants to build a single MPR chassis that handles both persistent and managed loads. This is a common pattern in security rack builds where the NVR and core network stay live while display and peripheral power can be cycled remotely.

No isolated ground on this module — if your installation requires isolated ground for audio equipment or sensitive medical-adjacent gear, a different MPR module variant is the correct specification. TAA compliance is not applicable to this SKU, so federal procurement officers should note that and verify separately if required.

Frequently Asked Questions

Q: Does the M-15A require a specific Middle Atlantic MPR chassis to function?

A: Yes. The M-15A is a modular insert designed exclusively for Middle Atlantic MPR (Modular Power Raceway) always-on chassis positions. It is not a standalone PDU and cannot be used independently. Verify your MPR chassis model accepts always-on duplex module configurations before ordering.

Q: Is the M-15A TAA compliant for government or federal procurement?

A: No. Per the product specifications, the M-15A is not TAA compliant. Federal or GSA procurement officers should verify this before including it in a TAA-required project specification.

Q: Does the M-15A provide isolated ground?

A: No. The M-15A does not include an isolated ground. If your rack build requires isolated ground — common in broadcast, audio production, or certain medical-adjacent environments — specify a different MPR module variant that supports that feature.

Q: What outlet type does the M-15A use?

A: The M-15A uses NEMA 5-15R receptacles (two outlets). This is standard North American 15A/120VAC. Any device with a NEMA 5-15P plug rated at or below 15A on the circuit connects directly without adapters.

Q: Is the M-15A a switched outlet module?

A: No. The M-15A is classified as an always-on module — it delivers continuous power regardless of the MPR chassis master switching state. It is the correct choice for devices that must remain powered at all times (NVRs, managed switches, access control panels). Do not use it where remote power cycling of the connected device is required.

Q: What safety certification does the M-15A carry?

A: The M-15A is ETL Recognized by Intertek, indicating it has been tested to applicable UL safety standards. This is the compliance documentation typically required by electrical inspectors and AHJs during rack installation review.

James Everett

The M-15A is the kind of component that looks like a minor line item until you're commissioning a rack and realize you misspecified the module mix — then it holds up the whole installation. The always-on classification is the spec that drives placement decisions: these 5-15R outlets stay live regardless of the MPR master switch state, so they belong on positions feeding NVRs, core switches, and access control hardware, not positions you'd ever want to cycle remotely.

Technical Highlights:

• 15A / 120VAC Single Circuit: Both outlets share one 15A circuit — the combined draw of whatever you plug in on outlet A and outlet B counts against the same breaker. At 120VAC, that's a 1,800W theoretical max; derate to 80% for continuous loads and you're working with ~1,440W across both receptacles. Know your device draw totals before populating both outlets on the same module.
• NEMA 5-15R Receptacles: Standard North American 15A form factor — no pigtail adapters, no NEMA 5-20R compatibility questions. Most rackmount security equipment in the under-12A draw range ships with a 5-15P plug and connects directly.
• ETL Recognized: Intertek ETL Recognition means the module passed independent testing to UL safety standards. On commercial installs where the AHJ does a walkthrough, this is the cert that keeps the inspection moving rather than flagging the rack power components for re-review.

Deployment Considerations:

• Confirm your MPR chassis has open always-on module positions before ordering. The M-15A will not install into switched or specialty module slots — the chassis slot type must match the module type, and some MPR configurations reserve certain positions for specific functions.
• No isolated ground on this module. If the rack build includes sensitive audio, broadcast, or instrumentation equipment that specifies isolated ground on the outlet, a different MPR module is required. Trying to work around this at the outlet level (external filters, ground lift adapters) is the wrong approach — specify the correct module upfront.

The M-15A is the right call for security rack builds where a subset of positions must stay powered through any master switching event — specifically NVR positions, PoE switch feeds, and access control panel circuits in mixed always-on/switched MPR chassis configurations. If the entire rack needs always-on power, you're better served by a fully always-on MPR unit rather than mixing module types.