Travel Question: Electrical ?Converter ?Transformer Needed?

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Travel Question: Electrical ?Converter ?Transformer Needed?

Postby racita » Tue Jan 26, 2010 10:53 pm

Traveling in Israel (with ResMed III VPAP with humidifier), I know I need an electrical adaptor, but will I need a transformer or converter too? The voltage is different there, but I don't know if a regular adaptor is all I need.
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Postby SleepyToo » Wed Jan 27, 2010 7:23 am

Most modern electronic devices are fine with voltages across the world. You should find an information 'card' somewhere on yours that gives a range of voltages. If the Israeli voltage is within that range, you do not need a transformer. Just an adapter (and a cheap extension cord from your home country.
SleepyToo
Philadelphia Area
Diagnosed September 2009, Respironics System One w/ C-flex and humidifier
Aloha nasal pillows
Not a medical professional, just a patient with severe OSA (31) who has done a lot of reading.
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Postby Bill Bolton » Wed Jan 27, 2010 6:16 pm

SleepyToo wrote:Just an adapter (and a cheap extension cord from your home country.

If you are going to a 220/240V AC mains power area DO NOT just get a cheap US extension cord.

Make sure you get one which has insulation rated for ~220V AC...... which usually means not one of the cheap "figure 8 line cord" variety. If you are looking in supermarkets, the extenion cords made from thicker, orange/yellow, circular cable should generally be OK.

Cheers,

Bill
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Postby racita » Thu Jan 28, 2010 1:27 am

SleepyToo and Bill: Thanks for your help.
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Postby Bearded One » Thu Jan 28, 2010 8:43 am

I checked a few of the cheap extension cords I have here at home; they are all "zip cord" dime store type cords.

All of them use either SPT-1 or SPT-2 wire, which is UL rated for 300 V RMS, which works fine at 240 volts.

http://www.northwire.com/directSPT1Spec.php
http://www.northwire.com/directSPT2Spec.php

If you have a problem using a cord set that is rated for 120 volts on 240 volts, you will also have to change the CPAP power cord, which will also use SPT-1 or SPT-2 wire and be rated for use at 120 volts. The extension cord set and the CPAP power cord set are rated for use a 120 volts because of the type of power plug connected to it.
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Postby Bill Bolton » Thu Jan 28, 2010 6:14 pm

Bearded One wrote:All of them use either SPT-1 or SPT-2 wire, which is UL rated for 300 V RMS, which works fine at 240 volts.

The spec sheet for the SPT-1 wire indicates that in the 20 gauge type it is only rated for a current 2 Amps, which is not adequate for powering a CPAP + Humidifier. The other wire gauges are fine.

Bearded One wrote:you will also have to change the CPAP power cord

The Resmed supplied US power cord for their flow generators, which I have a couple of here, are rated for 240V AC operation.

Cheers,

Bill
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Resmed S8 Autoset Vantage

Postby freeman » Sat Feb 06, 2010 11:31 pm

I have recently purchased a Resmed S8 Autoset Vantage from America for use in Australia ( a 240v country)

The manual specs say Input range 100-240v 50/60Hz although on the power lead it says 125v

I can obtain a 240v power cord here, but am not sure if I need a step down transformer which is available at a local 'radio shack' type of retailer.

I dont want to fry my new machine and would appreciate advice as what I should do do :

a: just buy new machine cord at 240v to plug into the wall

OR

b: purchase step down transformer (approx AU$200)

your advice would be appreciated.........


Jenny
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Postby racita » Sat Feb 06, 2010 11:49 pm

Jenny (Freeman),
Wish I knew the answer to your questions. There are knowledgable folks on this board, so I'm sure you will get help. I'm so grateful to have found this forum. Good Luck to you.
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Postby el_zorro » Sun Feb 07, 2010 12:47 am

Bill Bolton wrote:
SleepyToo wrote:Just an adapter (and a cheap extension cord from your home country.

If you are going to a 220/240V AC mains power area DO NOT just get a cheap US extension cord.

Make sure you get one which has insulation rated for ~220V AC...... which usually means not one of the cheap "figure 8 line cord" variety. If you are looking in supermarkets, the extenion cords made from thicker, orange/yellow, circular cable should generally be OK.

Cheers,

Bill

The current (amperage) is actually exactly half with 220V than with US 110V power, so if you have a 2 AMPs of current, 1 AMP would flow on each wire. The second wire in a simple extension cord can be used causing no harm to a CPAP. In 110V power the second wire is used as a neutral wire to complete the circuit but the amperage is double than for 220V.

I know this because I just got back from China and used a cheap extension cord with the standard power cord on my ResMed Autoset II and it worked just fine with 220V power. A bulky cord add weight to my travel which I am not interested in.

The key is if the CPAP unit is compatible with 220V which almost all of the new ones are.
Therapy started on Dec. 21, 2009
ResMed Mirage SoftGel nasal mask
Phillips Respironics REMstar Pro System One with C-Flex+ and heated humidifier at 11 cm.
Travel/Backup Machine ResMed S8 Autoset II with EPR and H4i heat humidifier at 8-11.6cm.
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Postby freeman » Sun Feb 07, 2010 5:01 am

Hi Racita

Thanks for the encouragment - this compatibility voltage thing sure has had me scratching my head. I hope someone can answer this in a simple way for me
to understand.

ie: go buy new 240v lead

OR

go buy step down transformer ;-)

Those instructions I can follow...............

once 'blonde' now grey jenny
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Postby Tarhead » Sun Feb 07, 2010 9:00 am

Traveling with electrical medical equipment to most places has been made very easy! Most modern equipment is dual voltage...ie: it will switch automatically to 110 or 220 volts depending on the type of power it receives. You just need to have the correct plug adapter to adapt your plug to the wall. The most important thing (and it's REAL IMPORTANT!!!) is that the label or decal or etched information near the where the power cord plugs into the machine HAS to say INPUT: 110/220V, 50-60Hz. If it does, go to online and search for the correct adapter. Amazon has them cheap as does most big electronic chains. No need to pay a premium at a special travel store.

It looks like for Israel you need both the 2 prong European and a 3 prong grounded type of adapter to cover both types of wall plugs you will come across while there.

PS: If your other electronic stuff is dual voltage the same applies. Your laptop power supply is most likely dual voltage too.
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Postby freeman » Sun Feb 07, 2010 4:28 pm

Hi Tarhead

So its OK for 110/220V but what if power supply is 240V ?????????????


Many thanks
jenny
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Postby Tarhead » Sun Feb 07, 2010 5:30 pm

freeman wrote:Hi Tarhead

So its OK for 110/220V but what if power supply is 240V ?????????????


Many thanks
jenny


Jenny,
Check the label. Most devices can tolerate a fairly wide range in voltage. My F&P HC254 CPAP machine is labeled to be able to accept 100-115V 50-60 Hz 1.2 amps OR 220-240V 50-60hz 0.8 amps. It automatically switches between the power ranges depending on the particular power it senses coming in the power cord. Contact the manufacturer of your equipment at their toll free customer care line if you need more reassurance but I'm sure you'll be ok if your machine was made in the last few years and is labeled for dual voltage. I would ask them about a different power cord if you are concerned but I've never had an issue traveling to countries in Europe, UK, and the Pacific Rim with my dual voltage equipment. Here is a good reference for different mains (wall current for us US folks :lol: ) and plugs around the world: http://en.wikipedia.org/wiki/Mains_powe ... _the_world
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Postby Bill Bolton » Sun Feb 07, 2010 6:00 pm

el_zorro wrote:so if you have a 2 AMPs of current, 1 AMP would flow on each wire.

2 amps flows in each wire as they are part of the one electrical circuit.

Your electrical theory is quite wrong.

Cheers,

Bill (professional member of the Institute of Electrical & Electronic Engineers)
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Postby Tarhead » Sun Feb 07, 2010 8:31 pm

freeman wrote:Hi Tarhead

So its OK for 110/220V but what if power supply is 240V ?????????????


Many thanks
jenny


Jenny,
Sorry for the long winded response. I didn't see your earlier post. :oops:
Contact Resmed Australia and explain your situation regarding your power cord. I'm sure they have a few thousand spares that will fit your machine and your Aussie wall outlets.. Your machine will work just fine with the correct power plug.
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