Standard 1778, Edition 5
UL 1778

Uninterruptible Power Systems

UL CSDS Proposal Edition 5 Published Date: September 30, 2016 Last Revision: April 03, 2024

Summary of Topics b1778_5_20160930_sum.html

Subject 1778

Bulletin Dated: September 30, 2016

SUMMARY OF TOPICS

The following changes in requirements to the Standard for Uninterruptible Power Systems, UL 1778, are being proposed for preliminary review and comment only:

1. For Preliminary Review Only: Add a dated reference to UL 60950 RD

2. For Preliminary Review Only: Update references to the component requirements of the RD

3. For Preliminary Review Only: Update to Table 4.5.3.101A for temperature limits

4. For Preliminary Review Only: Revision to bus bar temperature limits

5. For Preliminary Review Only: Add symbol for no telecommunication network

6. For Preliminary Review Only: Corrections in Annex NNN for short-circuit withstand rating

7. For Preliminary Review Only: Addition of requirements and figure for short circuit withstand and short circuit closing test port location

8. For Preliminary Review Only: Updates to References

Back to Standard 1778, Edition 5

The cost to purchase this Standard varies depending on whether you are ordering a hardcopy, PDF or combination of the two. We also offer two different types of subscriptions: a one year and a three year.

You will be able to choose your purchase options on the following pages.

×
×
×
×
×

You have one or more subscriptions that will expire soon.

×

You have one or more licenses to assign

×

Additional information required

To serve you better, please update your account details.

Featured Standards


Recently Published











Coming Soon

UL 48
Electrical Signs
Revision Pages

UL/ULC 25
Meters for Flammable and Combustible Liquids and LP-Gas
Revision Pages

UL 155
Tests for Fire Resistance of Vault and File Room Doors
Revision Pages

UL 310
Electrical Quick-Connect Terminals
New Edition

UL 19
Lined Fire Hose and Hose Assemblies
Revision Pages

UL 104
Elevator Door Locking Devices and Door or Gate Closed Detection Means
New Edition

UL 217
Smoke Alarms
Revision Pages

UL 294
Access Control System Units
Revision Pages
×