Technical Brief for Installation of Consumption Monitoring
Table Of Contents
- Assessing a Site for Installation of Consumption Monitoring
- For North America and Latin America
- About the Enphase Envoy-S Metered
- About Consumption Monitoring
- Consumption Current Transformers
- Site Assessment Form
- Circuit Detail Form
- 200A Consumption CT Dimensions
- Location of the Envoy-S Metered
- Installation of Consumption CTs
- Installing CTs in a simple scenario
- Installing CTs in Eaton Service Panels / Solar Power Center
- Installing Multiple Conductors in a Single CT
- Installing Parallel Connected CTs for 400A Services and Crowded Service Panels
- Calculating Whether Multiple Conductors Fit Within a CT
- Example Calculations for a Service Panel
- Retrofitting the Electrical Service for CT Installation
- Extending the Consumption CT Conductors
- Net Consumption versus Total Consumption
- Monitoring with the Installer Toolkit Mobile App
- Troubleshooting
- Viewing Sites with Consumption Monitoring
Installing Consumption CTs
2016 Enphase Energy Inc. All rights reserved. January 2016
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Site Assessment Form
When considering consumption monitoring, first determine if the split-core consumption CTs can be readily
installed around the service conductors or busbars. If the consumption CTs cannot be easily installed on the
service panel, additional electrical wiring may be required to prepare the site.
To complete the site assessment form, an electrician may need to remove electrical enclosure covers. This
must be performed by a competent individual. Follow all safety and installation instructions in the
Enphase Envoy-S Installation and Operation Manual. If the main electrical meter is installed in a separate
enclosure from the main service panel, you can probably install consumption CTs without any additional
electrical wiring.
Complete the form below appropriate to your installation.
Separate Meter and Service Panel
YES
NO
Is the utility meter installed in an enclosure separate
from the main electrical service panel?
Do both of the conductors in the main service panel
have at least 2.0 inches of accessible length?
If conductors are present, are they smaller than
350MCM THWN, 350MCM XHHW,or 4/0 RHW? If
busbars are present, are they thinner than 0.75
inches?
Is there adequate space (0.75 inches) around each
conductor/busbar to install the consumption CTs?
If you answered yes to all four questions above, the CTs can be
readily installed without rewiring the service equipment.
Combined Meter/Main Service Panel
YES
NO
Is the utility meter installed in a combined meter or
main service panel
Do both of the conductors/busbar in the main service
panel have at least 2.0 inches of accessible length?
If conductors are present, are they smaller than
350MCM THWN, 350MCM XHHW,or 4/0 RHW? If
busbars are present, are they thinner than 0.75
inches?
Is there adequate space (0.75 inches) around each
conductor/busbar to install the consumption CTs?
If you answered yes to all four questions above, the CTs can be
readily installed without rewiring the service equipment
If the service conductors or busbars are not readily accessible for the split
core consumption CT installation, this document provides additional tips and best practices that allow for
easy installation of the CTs.