Technical information

b) The short circuit current

rating determined by the

voltage rating of the

component and the assumed

short circuit current rating

from Table SB 4.1;

If the power circuit component

does not have a short circuit

current rating or has not been

required to have a rating in the

past,Table SB4.1 in UL508A,

Supplement SB lists the assumed

maximum short circuit current

rating for unmarked products.

c) The short circuit current rating for a load controller,motor overload relay, or

combination motor controller that has been investigated in accordance with

the performance requirements, including short circuit test requirements for

standard fault currents or high fault currents specified in the Standard for

Industrial Control Equipment, UL 508, and described in the manufacturer’s

procedure.

Part c) states that specific tested combination ratings can be used by a panel

manufacturer if the combination ratings are included their UL procedure file.

Rockwell Automation tests and certifies a wide-range of NEMA and IEC

components to meet the requirements of NEC Article 409 and UL 508A,

Supplement SB (See page 100).

INDUSTRIAL MACHINERY

Nameplate

Table SB4.1 Assumed maximum short circuit

current rating for unmarked components

Examples of short circuit current rating product markings on nameplates and in

reference documents

Installation Sheets

User Manual