CSED General Information
Ring vs. Ringless Type
There are two types of electrical meter socket enclosures: ring enclosures and ringless enclosures. Although the ring and ringless types serve the same purpose, there are some physical variances between the two. These distinctions are based on the utility requirements of the installation's geographic location.
The following are factors to consider:
Way to secure the meter to the socket
The ring style employs a specially shaped ring that connects the enclosure's meter curl and the meter. These rings are offered in two styles: snap and screw. The retainer for ringless style metering is the cover, which has an embossment for the meter. After all work has been done and the meter has been fastened, a sealing or locking mechanism is placed in either form.
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Region
The type of meter enclosure to be used for a certain application is decided by the electrical utility company operating in that location. Ring style metering is prevalent in the western region, but ringless metering is prevalent in the eastern region.
Bypass type
A bypass is a mechanism that only the utility can install to ensure that the flow of power is not disrupted when the meter is removed for maintenance. In most cases, a bypass is not available in residential applications. A bypass, on the other hand, may be employed if the regulating utility approves it for a unique use that does not require the electrical current to the residence to be interrupted.
A bypass is required in commercial applications because a power outage would cause problems for the business. Depending on whether the meter is ring or ringless, different bypasses are available.
| Ring type bypass type | Test block bypass (Available only for EZM) |
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The technician manually installs a set of bypass connectors extending from the line to load side connectors feeding to and from the meter being tested. Once the jumpers are in place, current carrying flat washers are removed from each phase and at this point the meter is bypassed, or isolated from the circuit. |
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Manual bypass |
| Consists of a threaded stud and keps nut on the line side bussing and the load side bussing, on each phase that will accept a utility company supplied jumper. | |
| Ringless Bypass type | Horn bypass |
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Short bus connectors extend upward from the line side and downward from the load side meter socket jaws. The ends of these bus connectors give the appearance of horns. One jumper cable per phase is manually installed by a qualified service technician creating a path for current to flow once the meter is removed from the socket. |
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Lever bypass |
| It is supplied with a swing arm or lever extending from the right side of the meter socket. Once the ringless meter socket cover is removed, this dual function lever may be manually rotated upward to engage bypass rotor blades into line and load bypass jaws allowing current to flow through the meter socket with the meter in or out of the meter socket. | |
| The second feature this lever provides is a jaw release function. By rotating the lever up as far as possible the spring-loaded meter socket jaws are spread open for ease of meter installation or removal. | |
| The third aspect of this lever is that it prevents the cover from being installed when the bypass is operational, stopping current flow while no meter is present. |
Enclosure and Knockout Information
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| Symbol | A | B | C | D | E | F | G | H | I | J |
| Conduit size (in.) | 1/2 | 3/4 | 1 | 1-1/4 | 1-1/2 | 2 | 2-1/2 | 3 | 3-1/2 | 4 |
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General Information and Application Data
Circuit Breakers for use with Meter Mains and All-in-One Devices
| Rating (A) | HOM, 1P | HOM, 2P | QO 1P | QO 2P | QO -VH 1P | QO -VH 2P | QOM1 -VH 2P | QOM2 -VH 2P | QDL 2P * |
|---|---|---|---|---|---|---|---|---|---|
| * | Cat. No.(DE2A) | Cat. No. (DE2A) | Cat. No. (DE2A) | Cat. No. (DE2A) | Cat. No. (DE2A) | Cat. No. (DE2A) | Cat. No. (DE3D) | Cat. No. (DE3D) | Cat. No. (DE2A) |
| 10 | — | — | — | — | — | — | — | — | |
| 15 | — | — | — | — | — | — | |||
| 20 | — | — | — | — | — | — | |||
| 25 | — | — | — | — | — | — | |||
| 30 | — | — | — | ||||||
| 35 | — | — | — | — | — | — | |||
| 40 | — | — | — | — | |||||
| 45 | — | — | — | — | — | — | |||
| 50 | — | — | — | ||||||
| 60 | — | — | — | — | |||||
| 70 | — | — | — | ||||||
| 80 | — | — | — | — | |||||
| 90 | — | — | — | — | |||||
| 100 | — | — | — | ||||||
| 110 | — | — | — | — | |||||
| 125 | — | — | — | ||||||
| 150 | — | — | — | — | |||||
| 175 | — | — | — | — | |||||
| 200 | — | — | — | — | |||||
| 225 | — | — | — | — | — | — | — | — |
The VH stands for "very high". It refers to the interrupt rating (AIC), which is 22 kAIC, as opposed to the standard 10 kAIC.
Accessories and Hubs
Hubs
Square D equipment with NEMA 3R rainproof construction, utilizes hubs listed below. Hubs are suitable for use with conduit having ANSI standard taper pipe thread.
A: type hubs are supplied with four 12–24 x 3/4 in. slotted hex-washer head screws.
A–L: type hubs are supplied with four 1/4– 20 x1/2 in. slotted screws. An adapter plate is required to allow use of A hubs on A-L size hub openings: catalog number AAP.
B: type hubs will accept ¾ through 2½ in. conduit sizes without the use of reducers. Off-center conduit thread openings and elongated mounting holes provide quick and easy adjustment to eliminate costly conduit offsets and bends. B300 and B400 are designed for mounting in field cut opening. Includes gasket and four mounting bolts and nuts.
Hubs
| Hub Series | Conduit Size (inches) | Cat. No. |
|---|---|---|
| Closing Plate for A Hub opening | ACP | |
| A | 1 | |
| 1.25 | ||
| 1.5 | ||
| 2 | ||
| 2.5 | ||
| Adapter plate to allow use of A Hubs on A—L size hub openings | AAP | |
| Closing Plate for A—L Hub opening | ACPL | |
| A-L | 2 | |
| 2.5 | ||
| 3 | ||
| 3.5 | ||
| 4 | ||
| Closing Plate for B Hub opening | BCAP | |
| B | 0.75 | |
| 1 | ||
| 1.25 | ||
| 1.5 | ||
| 2 | ||
| 2.5 | ||
| B300 | 3 | |
Series A Hubs
Equipment with provisions for A Hubs:
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Individual Meter Sockets, Class 4131
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Horizontal Ganged Meter Sockets, Class 4121
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Combination Service Entrance Devices, Class 4119/4120
Bolt-on hub supplied with four 12–24 x 3/4 inch slotted hex-washer head screws.
Series A – L Hubs
Equipment with provisions for A-L Hubs:
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Individual Meter Sockets, Class 4131
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Horizontal Ganged Meter Sockets, Class 4121
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Combination Service Entrance Devices, Class 4119/4120
Bolt-on hub supplied with four 1/4-20 x 1/2 inch slotted screws.
Adapter plate required to allow use of A hubs on A-L size hub openings: catalog number AAP.
QO/Homeline CSED Accessories
Solar Ready Kits Field-installable lug kit enabling a supply-side source connection in accordance with NEC 705.11
| Catalog Number | Description |
|---|---|
| Solar Ready Kit for Type SC semiflush mounted Solar ready devices (includes lugs and replacement UL67 barrier) | |
| Solar Ready Kit for Type SC surface mounted solar ready devices (includes lugs and replacement UL67 barrier) | |
| Solar Ready Kit for UG 200 A max. meter mains CU/QU48, CU/QU816, SU/RU48, and SU/RU816 |
Generator Circuit Breaker Interlock kit Interlocks main service disconnect and generator circuit breaker (order separately)
| Catalog Number | Description |
|---|---|
| Homeline CSED devices RC816F, RC2040M, SO2040M containing suffix C or CH | |
| QO CSED Devices QC816F, QC2442M containing suffix C or CH | |
| Homeline SU/RU48 and SU/RU816 - 200 A max. meter mains | |
| QO CU/QU48 and CU/QU816 - 200 A max. meter mains |
Lug Kits
| Catalog Number | Description |
|---|---|
| Lug Kit includes four lugs, for use with 2 AWG 600 kcmil Ai/Cu conductors. Lugs are for standard two-hole mounting. Meter main and all-in-one units supplied with two studs per phase and neutral will accept one lug per phase and neutral. Not for use on 400 A devices with “K” suffix. | |
| Field -installed for 6–2/0 Ai/Cu AWG wire. For meter main types: RC, SC, QC and all -in-one types: SC, SU, QC, RC |
Other Accessories
| Catalog Number | Description |
|---|---|
| Fifth Jaw Kit for meter main types: C, RC, SC, QC and all-in-one types: SC, SU (100–225 A), QC, RC, SO | |
| Branch Circuit Breaker Field Installation Kit for two Q -Frame circuit breakers (QBL, QDL, or QGL, order separately). For CUM400CB, QUM400CL or QUM400CK - includes two mounting pans, four wires. | |
| Bypass (Horn Type) for ringless type meter mains and all-in-ones (100 –200 A) (except for RC8L125S, RC1624M100S and RC1624M125S –use RCHB). | |
| Anti-Inversion Kit . For use ONLY on 400 A meter mains and all-in-ones with lever bypass. | |
| Overhead feed through for 400 A ring - and ringless-type meter mains and all-in-ones. | |
| Overhead Barrier Tunnel Kit for lever bypass RC/QC devices | |
| Barrel Lock Kit (Barrel Lock not included), supplied with bracket and mounting screw, refer to listings for where used. | |
| Touch -up paint (ASA49 Gray) |
Surge Protective Devices (SPD)
Square D Whole Home Surge Protection blocks the voltage spikes at the load center, providing downstream protection for all your connected devices. Square D Surge Protective Devices have been developed based on decades of expertise and industry-leading technology, making it a trusted brand among homeowners and electrical contractors alike.
How do you decide which device is best for your home? Consider the following when working with your electrical contractor.
Load Center and CSED Surge Protective Devices
| Cat. No. | Description | Surge Current per Phase (kA) |
|---|---|---|
| 1 phase - 3 wire | ||
| QO Surgebreaker | 22.5 | |
| HOM Surgebreaker | 22.5 | |
| 1Ø3W —120/240 V Compact SPD | 36 | |
| QO Plug -on Neutral SPD | 50 | |
| HOM Plug -on Neutral SPD | 50 | |
| Surge Arrest Whole Home Electronic Protection | 25 | |
| Surge Arrest Whole Home Electronic Protection | 50 | |
| Surge Arrest Whole Home Electronic Protection | 80 | |
| Surgebreaker Plus (all -in-one protection for appliances, Ethernet, and telephone) | 80 | |
Whole Home Surge Protection
Plug-on Neutral SPD for QO ( QO250PSPD ) and Homeline ( HOM250PSPD )
Use – QO250PSPD for QO load centers, combination devices (CSEDs) and NQ panelboards. HOM250PSPD for Homeline load centers and combination devices (CSEDs)
Feature – Plug-on Neutral connectivity, no wiring needed
Installation Flexibility – NEMA 1 (Indoor)
Surge Current Capacity – 50 kA
Standards – UL Listed 1449, 4th Edition and CSA Certified
Warranty – 5 Year / $50,000 connected equipment limited warranty
Hard-Wire Whole House Surge Protective Device (SDSA1175)
Use – Suitable for Use in Service Entrance locations: Meets Requirements of NEC Article 280
Feature – Coordinated Fuse Technology
Installation Flexibility – NEMA 4X (Indoor & Outdoor)
Surge Current Capacity – 36 kA
Standards – UL Listed 1449, 4th Edition and CSA Certified
Warranty – 2 Years
Surgebreaker for QO (QO2175SB) and Homeline (HOM2175SB)
Use – QO2175SB for QO load centers, combination devices and NQ panelboards. HOM2175SB for Homeline load centers and combination devices
Installation Flexibility – NEMA 1 (Indoor)
Surge Current Capacity – 22.5 kA per phase
Standards – UL Listed 1449, 4th Edition and CSA Certified
Warranty – 3 year / $10,000 connected equipment limited warranty
Home Electronics Protective Device (HEPD25, HEPD50, HEPD80)
Use – Small, affordable whole house surge suppression that can easily be mounted to Square D and competitors load centers
Installation Flexibility – NEMA 4X (Indoor & Outdoor). Easy-to-install, optional flush mount kit for a professional look when installed in a finished wall ( HEPD25MKF , HEPD58MKF )
Surge Current Capacity – 25 kA ( HEPD25 ), 50 kA ( HEPD50 ) and 80 kA ( HEPD80 )
Standards – UL Listed 1449, 4th Edition and CSA Certified
Warranty – 3 Year/$30,000 (HEPD25) or 3 Year/$50,000 (HEPD50) or 5 Year/$75,000 (HEPD80) connected equipment limited warranty
Surgebreaker Plus Whole House Surge Protector (SDSB80111)
Use – Mounts directly to any load center from any manufacturer
Feature – Removable modules (cable, Ethernet, and telephone) allow quick and easy installation customizing
Installation Flexibility – NEMA 1 (Indoor)
Surge Current Capacity – 80 kA
Standards – UL Listed 1449, 4th edition
Warranty – 5 Year/$100,000 connected equipment limited warranty