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.
WARNING
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.
Item Number: ADAPT-Y
Price: $69.00
Shipping Weight: 3 lbs.
This item normally ships within 5 business days after order acceptance.
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.
