Square D - RC3040M150SL Test Block Bypass Meter Socket | 150A Ringless NEMA 3R

Square D RC3040M150SL — Test Block Bypass Single Meter Socket, 150A, NEMA 3R, Ringless

The Square D RC3040M150SL is a 150-amp test block bypass meter socket featuring a ringless cover, NEMA 3R outdoor-rated enclosure, and 120/240V single-phase, 3-wire configuration. Purpose-built for utility and commercial metering installations requiring safe meter bypass capability, this UL-listed unit is engineered for reliable long-term outdoor service.

Key Specifications

• Part Number: RC3040M150SL
• Brand: Square D / Schneider Electric
• Type: Test Block Bypass Meter Socket
• Amperage: 150 Amps
• Voltage: 120/240 VAC
• Circuit: 1-Phase, 3-Wire
• Enclosure: NEMA 3R (Outdoor Rated)
• Cover Type: Ringless
• Mounting: Surface Mount
• Listing: UL Approved

Product Overview

The RC3040M150SL delivers the same trusted test block bypass platform as the RC3040M series at a 150-amp rating, making it the right choice for residential and light commercial service entrances where bypass metering is a utility requirement but full 200A capacity isn't needed.

The integrated test block allows utility crews to safely test, calibrate, or replace the revenue meter without interrupting electrical service — a critical capability for utilities committed to uptime and customer satisfaction. The ringless cover ensures tamper-resistant meter access and is accepted by major utilities across North America. NEMA 3R construction makes the RC3040M150SL weather-resistant and reliable in outdoor environments year-round.

Why Choose the Square D RC3040M150SL?

• Test block bypass allows live meter replacement without service interruption
• 150A rating optimized for residential and light commercial service entrances
• Ringless cover — tamper-resistant and widely utility-accepted
• NEMA 3R outdoor enclosure withstands rain, sleet, and ice
• UL listed for NEC-compliant installation
• Surface mount design for straightforward field installation

How It Compares: RC3040M150SL vs RC3040M200SL

• RC3040M150SL: 150A — Residential and light commercial service entrances
• RC3040M200SL: 200A — Larger residential and small commercial applications
• Both feature ringless covers, NEMA 3R enclosures, test block bypass, and UL listing

Applications

• Residential service entrances with utility bypass requirements
• Light commercial metering installations
• Utility infrastructure upgrades requiring test block access
• Municipal and cooperative utility metering programs
• New construction where utility-specified bypass sockets are required

Frequently Asked Questions

What is a test block bypass meter socket?
A test block bypass meter socket integrates a switching mechanism that allows a utility technician to safely bypass the revenue meter during testing, calibration, or replacement — without cutting power to the customer. This is required by many utilities to enable safe meter maintenance on live circuits.

What is the difference between the RC3040M150SL and RC3040M200SL?
The primary difference is amperage: the RC3040M150SL is rated at 150 amps, while the RC3040M200SL is rated at 200 amps. Both share the same ringless design, NEMA 3R enclosure, test block bypass functionality, and UL listing.

What does "ringless" mean on a meter socket?
A ringless meter socket uses an integrated cover latch rather than a separate locking ring to secure the utility meter. This design is preferred by many utilities for its tamper-resistance and simpler field operation.

Is the RC3040M150SL available new or used?
The RC3040M150SL is available in both New and Used condition. Contact us to confirm current stock and pricing for each condition.