Page last updated Dec 14, 2011 @ 02:56pm
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Cordset Y Adaptor
(2) male plugs
(1) female connector
Do you have a generator which does NOT have the 240V standard 4 pole twist lock receptacle for matching up to the standard cordsets and switches? Not a problem! Read on...
Most of the cordsets and transfer switches and panels sold are set up for 4 pole twist lock plugs and receptacles such as NEMA types L1420 and L1430. But some smaller generators and those without control panels may only have the 3 pole straight blade 120V or 240V NEMA duplex receptacle.
GENERATORS WITH ONLY 120V DUPLEX OUTLETS (NO 240V OUTLETS)
If your generator only has a 120V duplex outlet but has a separate pushbutton circuit breaker for each half of the duplex outlet this adaptor can normally derive 240V for your transfer switch. This is due to the fact that the separate circuit breakers usually mean your alternator actually has two 120V windings that are individually wired to each half of the duplex outlet. This adaptor not only provides 240V but since it connects to both halves of the duplex outlet you will be able to pull more capacity from the generator.
GENERATORS WITH 120V AND 240V OUTLETS BUT WITHOUT 240V TWIST-LOCK OUTLET
If your generator does have a 240V duplex outlet but it is a 3-prong straight blade rather than the desired 4-prong twist-lock, and one of them is insufficient to provide full generator capacity, this adaptor will connect to both halves of the 240V outlet to provide more capacity.
NOTE: If one of your generator's 240V straight-blade outlets is sufficient for providing full capacity from your generator don't use the Y adaptor. Simply order a standard cordset with the MOD6-20P cordset modification or a straight-through adaptor.
The version of this Y-Adaptor having 240V 3-prong male plugs ONLY works with generators that have the neutrals of the alternator windings tied/bonded to the frame ground and the ground in the output receptacles. Most portable generators ARE built this way today. But you MUST verify this is true for your generator before using this cordset.
The version of this Y-Adaptor having 240V 3-prong male plugs ONLY works with generators that have the neutrals of the alternator windings tied/bonded to the frame ground and the ground in the output receptacles. Most portable generators ARE built this way today. But you MUST verify this is true for your generator before using this cordset. This can be checked by: (a) Calling the Technical support phone number in your generator instruction manual and asking or, (b) looking at the wiring diagram in your generator instruction manual to see if this neutral-to-ground bond exists or, (c) checking the label on the alternator of your generator set, or (d) measuring the resistance from the 120V receptacle hot and neutral socket connections to the ground socket (must use a low range multimeter while the generator is not running). The neutral-to-ground resistance should be zero ohms and the hot-to-ground value should be about a half ohm. In some cases we can help verify this if we already have experience with your make and model generator, or if you FAX us the wiring diagram from your instruction book. We automatically verify this if you buy a generator from us.
In the unlikely event that your generator neutral is NOT grounded, we do have special cordset modifications that will work. These involve either a pigtail to pickup the neutral at the 120V receptacle or a separate plug that will ground the neutral. Email us for a quote if this applies to you.
The NEMA type male plug used is 2 pole, 3 conductor. Straight blade design with housing resistant to many chemicals. Cord clamp with terminal clamps and screws for superior wire holding and excellent conductivity. Color may vary. UL listed.
When ordering this modification, please state in the comments section on the checkout screen the make and model number of your generator and if you have verified that the neutral is grounded. Also confirm that your generator outlets look EXACTLY like the selected receptacle below.
Item Number: ADAPT-Y
Price last updated 2/25/2009
Shipping Weight: 3 lbs.
This item normally ships in approximately 1 week or less.
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