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Eaton Fifth Jaw Kit for 1MP 1MM 3MM Modular Metering Systems
Professional Meter Stack Enhancement Component
The Eaton Fifth Jaw Kit provides essential expansion capability for 1MP, 1MM, and 3MM modular metering systems. This UL Listed component ensures reliable performance and code compliance for professional electrical installations requiring additional metering positions in meter stack configurations.
Professional Features & Benefits
- UL Listed Certification: Meets rigorous safety and performance standards for commercial and residential electrical applications.
- Modular System Compatibility: Specifically designed for seamless integration with 1MP, 1MM, and 3MM metering systems.
- Fifth Jaw Configuration: Enables expansion of existing meter stacks for additional metering capacity and flexibility.
- Professional Grade Construction: Built to Eaton’s quality standards for long-term reliability in demanding electrical environments.
- Code Compliant Design: UL listing ensures compliance with electrical codes and utility requirements.
Technical Specifications
- Certifications: UL Listed
- Product Details: Fifth jaw kit
Professional Applications
- Multi-Unit Residential Properties
- Commercial Building Metering
- Industrial Facility Power Distribution
- Utility Metering Installations
- Electrical Contractor Projects
- Building Renovation and Expansion
Why Choose Eaton Quality?
Eaton delivers proven reliability through UL Listed certification and professional-grade construction. This fifth jaw kit component ensures code-compliant installations with the durability and performance standards expected from Eaton’s modular metering solutions.
Manufacturer Resources
Spec Sheet
Product Specs
- Certifications:
- UL Listed
- Department:
- Electrical
- Product Group:
- Power Distribution
- Product Type:
- Meter Stack
- Product Subgroup:
- Metering & Meter Sockets
Eaton 1MM5JKOP – Frequently Asked Questions
1) Will the Eaton fifth jaw kit work on my 1MM meter stack, or is it only for certain modular metering systems?
The Eaton fifth jaw kit is made for Eaton 1MP, 1MM and 3MM modular metering systems. It adds the fifth jaw position to a meter socket in those stacks. If your stack is another manufacturer's product, or an Eaton line outside those three families, this kit is not the part for it.
2) What is the difference between Eaton 1MM5JK and 1MM5JKOP fifth jaw kits?
Two versions are sold: 1MM5JK is the standard fifth jaw kit, and 1MM5JKOP is the isolated fifth jaw kit. The isolated version keeps the fifth jaw electrically isolated from the socket, which is what many utilities require for demand or pulse metering. Check the utility's meter spec sheet before you pick, because they are not interchangeable once the socket is wired.
3) Do utilities accept an Eaton fifth jaw kit for a 120/240V network meter installation?
The kit is UL Listed, which is the listing most utilities and inspectors look for on meter socket components. Acceptance of a field-added fifth jaw is still a utility-by-utility call, so confirm with the serving utility that they allow a fifth jaw retrofit on an Eaton 1MP, 1MM or 3MM stack before ordering.
4) I need to add a fifth jaw to an existing Eaton meter stack in the field. Is this a retrofit kit or does it have to be factory installed?
It is a kit, sold separately from the stack, for adding the fifth jaw position to Eaton 1MP, 1MM and 3MM modular metering equipment. That is what makes it useful on renovation and expansion work where the original sockets were ordered without the fifth jaw. Order one kit per socket position that needs it.
5) What does a fifth jaw do on a meter socket?
A standard single phase socket has four jaws for the line and load conductors. The fifth jaw carries the neutral or a voltage reference, and utilities require it on network services and on many three phase four wire and demand metering arrangements. Eaton's fifth jaw kit adds that position to 1MP, 1MM and 3MM modular metering sockets.
6) Is the Eaton fifth jaw kit suitable for a multifamily building meter bank?
Yes. Eaton 1MM and 3MM modular metering is exactly the multi-position stack equipment used on apartment and condo meter banks, and this kit brings individual socket positions in those stacks up to a five jaw configuration where the utility calls for it. It is also used on commercial and industrial metering built on the same Eaton platforms.
How fast can I get the Eaton 1MM5JKOP delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Eaton 1MM5JKOP come with a warranty?
Absolutely. The Eaton 1MM5JKOP is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Eaton 1MM5JKOP?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
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