Gemini Surge Model VG307

The Gemini Surge Model VG307 is a seven-outlet surge protector manufactured by Gemini.

The documented example features seven grounded outlets, a four-foot power cord, and a red rocker-style power switch. The unit is finished in a beige plastic enclosure typical of consumer surge protectors from the 1990s.

Overall view of the Gemini Surge Model VG307.

Documented Example

• OldSurge ID: OS-0007
• Estimated Manufacturing Period: 1990s

Specifications

• Manufacturer: Gemini
• Model: VG307
• Device Type: Surge Protector
• Outlets: 7 grounded outlets
• Maximum Load: 15A, 120VAC, 60Hz
• Maximum Suppression: 500V
• Power Cord:
  • Length: Approximately 4 ft (1.2 m)
  • Type: SJT
  • Conductors: 3
  • Wire Size: 14 AWG
  • UL Temperature Rating: 75°C
  • CSA Temperature Rating: 60°C
  • Flame Rating: FT2 (CSA)
  • Manufacturer: Rhythm
  • UL File Number: E88231
  • CSA File Number: LL54008
• Length: Approximately 12.25 in (31.1 cm)
• Width: Approximately 2.19 in (5.6 cm)
• Height: Approximately 1.25 in (3.2 cm)
• Weight: Approximately 15.6 oz (442 g)
• Country of Origin: China
• UL File Number: E111219
• CSA File Number: LR69225

Physical Description

The VG307 utilizes a long, low-profile beige plastic enclosure with rounded end caps and seven grounded outlets arranged in a single row.

A large red rocker-style power switch is positioned near the power-cord entry point. The switch operates perpendicular to the row of outlets. Although the switch resembles an illuminated rocker switch commonly found on surge protectors of the period, no illumination was observed on the documented example.

A resettable push-button circuit breaker is located adjacent to the power-cord entry point.

The attached power cord measures approximately four feet (1.2 m) in length and utilizes Rhythm-manufactured SJT cable marked UL file number E88231 and CSA file number LL54008. Cord markings identify the cable as a three-conductor 14 AWG assembly rated for 75°C under UL standards and 60°C under CSA standards.

The VG307 utilizes a grounded three-prong molded attachment plug permanently affixed to the power cord.

The housing is supported by molded feet that elevate the enclosure slightly above the mounting surface. The feet also help stabilize the unit and prevent rocking when placed on a flat surface.

The enclosure is assembled using screws, permitting non-destructive disassembly.

Mounting Provisions

The VG307 incorporates two keyhole-style mounting slots on the underside of the enclosure.

The arrangement of the mounting slots supports installation in either horizontal or vertical orientations, providing flexibility for wall, cabinet, desk, or under-bench mounting.

Product Gallery

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  Overall view of the Gemini Surge Model VG307.
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  Gemini Surge branding and power switch.
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  Close-up of the rocker power switch.
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  Oblique view showing the outlet arrangement and switch location.
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  Side profile of the Gemini Surge Model VG307.
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  Center outlet section.
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  Outlet detail near the end of the surge protector.
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  Power cord entry and resettable circuit breaker.
• 
  End view of the enclosure.
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  Bottom view of the VG307.
• 
  Cord-entry end showing wall-mount provisions.
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  Underside product information panel.
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  Bottom view of the end opposite the power cord.
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  Grounded power plug and cord.
• 
  Power plug with molded approval markings.
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  Power cord specification markings.
• 
  Additional power cord markings.

Testing

The documented example was tested for basic electrical operation and wiring integrity. A receptacle tester confirmed correct outlet wiring and grounding, and the rocker switch successfully controlled power to all outlets. Although the red rocker switch resembles an illuminated switch commonly used on surge protectors of the period, no illumination was observed during testing.

• 
  Outlet tester indicating correct wiring and grounding.
• 
  VG307 plugged in with the rocker switch in the OFF position.
• 
  VG307 plugged in with the rocker switch in the ON position.

Weight

The documented example weighs approximately 15.6 oz (442 g).

Gemini Surge Model VG307 on a digital scale.

Condition Upon Acquisition

The documented example was acquired as part of a collection of surplus electronic equipment and exhibited accumulated dust, dirt, cobwebs, and cosmetic wear consistent with long-term use.

The unit was cleaned prior to detailed documentation and photography.

VG307 as acquired before cleaning.

Teardown

The VG307 is assembled using multiple screws and can be opened non-destructively.

Internally, the unit utilizes stamped brass bus bars to distribute line, neutral, and ground connections to all seven outlets. This design minimizes wiring complexity and reduces the number of electrical connections required during manufacturing.

A single epoxy-encapsulated surge-suppression assembly is mounted near the cord-entry point. The encapsulated design prevents identification of the individual internal components without destructive analysis. The location and wiring of the assembly indicate that it provides the surge-suppression functionality associated with the VG307's "Gemini Surge" branding and 500-volt suppression specification.

The resettable overcurrent-protection device is a ROTECH Model R-100 push-button circuit breaker rated for 15A at 120VAC.

Color-coded assembly markings identifying the hot (black), neutral (white), and ground (green) conductors are molded into the upper housing.

Inspection of the interior revealed moderate dust accumulation and cobwebs but no obvious signs of overheating, melting, or catastrophic electrical failure.

• 
  VG307 opened following removal of the enclosure screws.
• 
  Enclosure screws removed during teardown.
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  Interior construction showing outlet assemblies and brass bus bars.
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  Cord-entry end showing internal wiring and circuit breaker.
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  Outlet end showing bus-bar power distribution.
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  Close-up of the epoxy-encapsulated surge-suppression assembly.
• 
  ROTECH Model R-100 push-button circuit breaker.

See Also

• Gemini
• Surge Protectors
• Collection Index