Difference between IS & NEMA std

No idea what "I.S" means, but NEMA is short for National Electrical Manufacturer's Association and publishes design "standards" for the North American (US*) marketplace. They are not enforced standards however, it's left up to the manufacturer to comply. However, if someone makes a claim of achieving NEMA standards and do not, the marketplace is cruel. In other words, there is no "testing authority" within NEMA, each manufacturer can do their own tests.

*Canada had EEMAC (Electrical Equipment MAnufacturer's Assoc. of Canada), but their standards were exxentially the same as NEMA and they have since been absorbed by CSA (Canadian Standards Assoc.) who is an independent testing agency.

thank you Jref...... actually I.S stands for Indian Standards (i.e., nothing but Bureau of Indian Standards BIS)............ Now could you explain the difference between I.S & NEMA...............

mshankar.85

IS are Indian Standards and NEMA are American standards.

Please understand that IS and similarly NEMA has thousands of standards each. These standards are used by the industry to manufacture equipment (mechanical, electrical, electronic, etc.), carry out engineering and construction.

Hence the question about the difference between them as a general statement is itself incorrect. We can compare one IS standard no. meant for a particular item to an equivalent NEMA standard meant for that item. If that is what you are interested in, then this forum will not be able to address the same. For that you will have to compare each standard.

k thank u my friend............. Let me put the same question like this........... Where we will be following I.S std & where we will be following NEMA standards???????

Follow the national standards applicable to the country of operation. For example, British and pan-European standards are used in the UK.

Let me put the same question like this........... Where we will be following I.S std & where we will be following NEMA standards???????

IS standards are recognised and used only in India. The NEMA standards are used throughout the world including in India for certain equipment / engineering aspects. Europeans normally use only IEC standards. The British have their own standards. Similarly there are separate Canadian standards.

Mostly it is the governing country and the owner of the industry (Client) that decides which standard is to be followed.

ya agreed......... In our Company also for some equipments we are following NEMA std......... for some BIS.........& for others both NEMA & BIS..... you had already mentioned that both the above std will contain same information, means all r interrelated............then y there is a need of following two std's?????? Please clarify me......thank u.............

The meaning of both the above std will contain same information, means all r interrelated is very limited. The objective of the standards (when you are comparing two similar standards) is same. But degree of severity may be deferent. Besides, there may be some national diferences.

Now a days IEC standards are mostly adopted in whole of europe and they are harmonised. Thus you will find BS EN and DIN EN standards will be almost same (with possibility of some national difference).

Now BIS also has started using IEC standards, which will be called IS IEC.

Though the standards are same in contents, every country will ask for using its own national standard.... BS EN will be acceptable in Britain and DIN EN in Germany. The reason is simple... the commertial reasons. To adopt any standard, you need to purchase the authorised copy of the standard. The costs of standards are quite hepty.

In India you are asked to follow IS standards, (BIS wishes so, but it is not mandatory except in some areas like hazardous areas) but users ask any international standard and you have to comply with it, to sell your product.

Depends on who your client is...

Wangito.