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Description
Hydel MSC400TW3 200A Underground Meter Socket with Isolated Neutral Capability, 1/2" Compression Studs & 2 x 3" Knockouts
Built for Ontario residential and light commercial service installations, the Hydel MSC400TW3 is a 200 amp, 600 volt, 4-jaw underground meter base with 1/2" compression studs, 2 x 3" knockouts, and a CSA/NEMA 3R enclosure. This model is especially relevant where electricians, contractors, and inspectors are focused on correct neutral bonding practice and isolated neutral requirements at the service entrance.
⚠️ Isolated Neutral Matters in Ontario
On many Ontario jobs, installers are specifically looking for meter bases that support isolated neutral configurations. That is not just a preference issue — neutral bonding in meter bases is a real inspection and safety topic. When an isolated neutral configuration is used, the bonding conductor and service bonding must still be completed correctly in line with code and utility practice.
- Hydro One’s approved meter-mounting guidance gives preference to isolating the neutral from the meter-mounting device on applicable models.
- ESA bulletins also warn that isolated-neutral meter bases require the correct bonding conductor arrangement to avoid unsafe installations.
- This product page is written to help contractors identify the MSC400TW3 quickly when isolated-neutral-ready meter bases are being requested.
🔌 Underground Service Ready
Designed for underground use only, making it suitable for many residential service entrance and meter base replacement applications in Ontario.
🧰 Compression Stud Design
Includes 1/2" line studs for compression-type wire connectors and supports a #6–250 MCM CU/AL load conductor range.
🏗️ Key KO Advantage
The MSC400TW3 differs from the standard MSC400TW by offering 2 x 3" knockouts and a deeper enclosure.
Hydel MSC400TW3 Meter Socket Overview
The Hydel MSC400TW3 is a contractor-focused 200A underground meter socket for service entrance applications where a 4-jaw, 600V meter base with 1/2" compression studs and larger 3" knockouts is required. For Ontario electricians, this model is a strong fit for service upgrades, new residential builds, and meter base replacements where conduit size and isolated neutral considerations matter.
Because many electricians search by exact part number, common buying phrases for this unit include: Hydel MSC400TW3, 200 amp underground meter socket, meter base with isolated neutral, Ontario meter base 200A, and Hydel 2 x 3" KO meter socket.
- Ideal for underground service entrance installations
- Useful where 3" knockout openings are preferred over 2-1/2"
- Supports Ontario-focused searches around isolated neutral meter base
- Suitable for contractors, builders, panel upgrade specialists, and electrical wholesalers
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Hydel |
| Model | MSC400TW3 |
| Type | Underground (U/G) meter socket |
| Amperage Rating | 200A |
| Voltage Rating | 600V |
| Jaw Configuration | 4 Jaw |
| Line Connection | 1/2" compression studs |
| Conductor Range | No. 6 – 250 MCM CU/AL |
| Knockouts | 2 x 3" KO |
| Enclosure | CSA / NEMA 3R |
| Dimensions | 18" H x 12" W x 5-1/8" D |
| Weight | 17 lbs |
| Application | For underground use only |
Typical Ontario Applications
- Residential service upgrades
- New home electrical service installations
- Meter base replacements
- Light commercial underground metering setups
Why Contractors Choose This Model
- Exact-part-number demand in the field
- Larger 3" KO configuration
- Hydel brand familiarity in Ontario
- Supports isolated-neutral-focused buying requirements
Hydel MSC400TW vs Hydel MSC400TW3
The main difference between these two Hydel meter bases is the knockout configuration and resulting enclosure depth. That distinction is important when the conduit layout on the job calls for 3" knockouts.
| Feature | MSC400TW | MSC400TW3 |
|---|---|---|
| Amperage | 200A | 200A |
| Voltage | 600V | 600V |
| Type | Underground | Underground |
| Jaw Configuration | 4 Jaw | 4 Jaw |
| Line Connection | 1/2" compression studs | 1/2" compression studs |
| Knockouts | 2 x 2-1/2" KO | 2 x 3" KO |
| Depth | 4-3/4" | 5-1/8" |
| Neutral Focus | Used where neutral bonding/isolation practice is relevant | Used where neutral bonding/isolation practice is relevant |
If your project requires the standard enclosure depth and 2 x 2-1/2" knockouts, view the Hydel MSC400TW meter socket .
Downloads & Resources
Use the documents below to review product details, drawing references, and Hydel’s broader service entrance product range.
What the shop drawing helps confirm
- Overall box size and depth
- Bottom knockout arrangement
- Compression stud layout
- Assembly reference details
What the Hydel catalogue helps confirm
- MSC400TW3 part-number listing
- 2 x 3" KO distinction vs MSC400TW
- 200A / 600V / 4-jaw configuration
- #6–250 MCM CU/AL conductor range
Frequently Asked Questions
Is the Hydel MSC400TW3 an underground meter socket?
What is the difference between MSC400TW and MSC400TW3?
Does this meter base use compression studs?
Why is isolated neutral important on Ontario jobs?
What conductor range does the MSC400TW3 support?
Is the Hydel MSC400TW3 approved for Ontario underground electrical service installations?
Contractor Pricing for Meter Bases & Service Entrance Products
Working on a service upgrade, custom home, or multi-unit electrical project in Ontario? Contact MarsLED for bulk pricing, contractor support, and product sourcing on Hydel meter bases and related electrical distribution products.
Supplying Electricians Across Ontario
MarsLED supplies Hydel meter bases and electrical service equipment to electricians and contractors across Toronto, Mississauga, Brampton, Vaughan, Markham, Richmond Hill, Oakville, Burlington, Hamilton, Milton, Kitchener-Waterloo, Cambridge, Guelph, London, Ottawa, Barrie, Kingston, Oshawa, Whitby and Ajax.
Contractors performing service upgrades, underground electrical installations, and residential electrical service work rely on MarsLED for reliable supply of Hydel meter bases including the MSC400TW3.
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