Hydel EK400RO 200A Combination Meter Socket with Isolated Neutral Capability | 4 Jaw | Ontario

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Description

Ontario Meter Base • Hydel EK400RO

Hydel EK400RO 200A Combination Meter Socket with Isolated Neutral Capability, 4 Jaw, Oversize Enclosure

The Hydel EK400RO is a 200 amp, 600 volt, 4-jaw combination overhead/underground meter socket designed for utility-facing residential and light commercial service installations. This model features an oversize enclosure, barrel-type line connectors angled at 45°, and a No. 6–250 MCM CU/AL conductor range. For Ontario applications where isolated neutral configuration is preferred, the EK series supports the Hydel INK200 insulated neutral accessory.

200A 600V OH / UG Combination 4 Jaw Oversize Enclosure INK200 Capable

⚠️ Isolated Neutral Preference in Ontario

On Ontario jobs, utilities often prefer the neutral to be isolated from the meter-mounting device on applicable models. The Hydel EK series lists the INK200 insulated neutral as a field-adaptable accessory, which makes the EK400RO relevant where isolated neutral configuration may be required by the service design, utility guide, or inspector.

  • Hydro One gives preference to isolating the neutral from the meter-mounting device on applicable models.
  • The EK series includes INK200 insulated neutral as a field-adaptable accessory.
  • Final approval depends on the exact SKU, installed configuration, utility requirements, and inspection method.
What is INK200?

For Ontario applications where isolated neutral configuration is preferred, the Hydel EK series supports the INK200 insulated neutral accessory. Hydro One guidance gives preference to isolating the neutral from the meter-mounting device on applicable models, while ESA guidance requires the neutral assembly and bonding method to match the grounding approach used on the installation. Final configuration should always be confirmed against the current utility guide and inspection requirements.

Always confirm the exact meter-base configuration, grounding method, and utility acceptance before installation and energization.

🔌 Combination OH / UG Design

Designed for combination overhead and underground service entry applications, making it suitable for a wider range of field conditions than a single-entry-only base.

🧰 Hydel INK200 Capability

The EK series supports the INK200 insulated neutral accessory, helping contractors configure the meter base appropriately where isolated neutral treatment is preferred or required.

📐 Oversize Enclosure

Built with an oversize enclosure and barrel-type connectors angled at 45°, making it a practical choice for service-entry installations requiring extra working space.

Hydel EK400RO Meter Socket Overview

The Hydel EK400RO is a 200A combination overhead/underground meter socket for service entrance applications where a 4-jaw, 600V, single-position meter base with an oversize enclosure is required. It is especially relevant for Ontario contractors looking for a Hydel combination meter base that can support isolated-neutral configuration through the INK200 insulated neutral accessory.


Common buying phrases for this unit include Hydel EK400RO, 200A combination meter socket, overhead underground meter base, Hydel 4 jaw meter socket, Ontario 200A meter base, and isolated neutral capable meter base.


  • Ideal for projects requiring combination overhead / underground entry
  • Useful where an oversize enclosure is preferred
  • Supports isolated-neutral-capable configuration through Hydel INK200
  • Suitable for electricians, builders, and electrical wholesalers in Ontario

Technical Specifications

Specification Details
Manufacturer Hydel
Model EK400RO
Type Combination overhead / underground meter socket
Amperage Rating 200A
Voltage Rating 600V
Jaw Configuration 4 Jaw
Connection Type Barrel-type connectors angled at 45°
Conductor Range No. 6 – 250 MCM CU/AL
Enclosure CSA enclosure 3R
Dimensions 18" H x 12" W x 4-3/4" D
Weight 15 lbs
Accessory Option INK200 insulated neutral (field adaptable)
Application Combination OH / UG service entrance

Typical Applications

  • Residential service entrances
  • Combination OH / UG service configurations
  • Utility-facing meter installations
  • Ontario contractor supply and replacement jobs

Why Contractors Choose This Model

  • Hydel brand familiarity in Ontario
  • Combination service entry flexibility
  • Oversize enclosure format
  • Supports insulated-neutral configuration with INK200

Hydel EK400RO vs Hydel EK400ROBC

These two Hydel EK-family models are closely related, but they are not identical. The main practical difference is that the EK400ROBC is specifically listed by Hydro One as an acceptable-example 200A overhead/underground model, while the Hydel catalogue shows the EK400ROBC with a 3" knockout in the bottom and deeper enclosure dimensions than the standard EK400RO.

Feature EK400RO EK400ROBC
Amperage 200A 200A
Voltage 600V 600V
Type Combination OH / UG Combination OH / UG
Jaw Configuration 4 Jaw 4 Jaw
Depth 4-3/4" 5-1/8"
Bottom KO Note Standard EK400RO format c/w 3" KO in bottom
Hydro One Acceptable-Example Listing Verify exact project suitability Listed by Hydro One
If your Ontario project needs exact Hydro One list alignment, verify whether EK400ROBC is the correct SKU before finalizing the product title and field application.

Downloads & Resources

Use the resources below to review Hydel product-family references, utility acceptance guidance, and related meter-base options.

What the Hydel catalogue confirms

  • 200A, 600V, 4-jaw EK400RO configuration
  • Oversize enclosure dimensions and weight
  • Barrel-type connectors angled at 45°
  • INK200 insulated neutral as a field-adaptable accessory

What Hydro One confirms

  • Preference for isolating the neutral on applicable models
  • EK400ROBC listed as an acceptable-example 200A OH/UG model
  • Unlisted models may still be installed if they meet Hydro One requirements
  • Final acceptance depends on exact model and installation details

Frequently Asked Questions

What is the Hydel EK400RO used for?
The Hydel EK400RO is a 200A, 600V, 4-jaw combination overhead/underground meter socket used for utility-facing service entrance applications.
Does the EK400RO support isolated neutral?
The EK series supports Hydel INK200 insulated neutral as a field-adaptable accessory. That means the EK400RO can be positioned as having isolated neutral capability, but the final installed configuration should be confirmed for the exact job.
Is the EK400RO an overhead or underground meter base?
It is a combination OH / UG design, meaning it is used for both overhead and underground entry configurations.
What conductor range does the EK400RO support?
Hydel lists the conductor range as No. 6 to 250 MCM copper or aluminum.
Is EK400RO approved for Ontario?
Ontario acceptance should always be verified against the exact SKU, the current utility requirements, and the authority having jurisdiction. Hydro One specifically lists EK400ROBC as an acceptable-example 200A OH/UG model, while unlisted models may still be used if they comply with Hydro One’s requirements.

Contractor Pricing for Meter Bases & Service Entrance Products

Working on a residential, utility-facing, or electrical service project in Ontario? Contact MarsLED for contractor pricing, sourcing support, and meter-base supply across Ontario and Canada.

Looking for an isolated neutral meter base?

For Ontario underground service installations requiring isolated neutral configurations, see the Hydel MSC400TW meter socket or the Hydel MSC400TW3.

Explore More Electrical Service Products

MarsLED supplies meter bases and service entrance products to electricians and contractors across Toronto, Mississauga, Brampton, Vaughan, Hamilton, Milton, Kitchener-Waterloo, Cambridge, London, Ottawa, Barrie, Kingston and across Ontario.

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