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Thanks rbulsara, But I meant the MCCB copper terminal temperature not the ambient temperature. Meanwhile I noticed that American manufacturers (e.g. ETON, GE..) are producing MCCB to IEC but not a complete switchgear, are you aware of any American manufacturers who produce form 4 LV switchgear...

I understand your argument but just for example, it may be irrelevant; there is a different requirement for the temperature rise of the MCCB wiring terminal between UL and IEC. Is there a similar case with the motors..

I know that there is a difference between motors designed to IEC and NEMA, my question is there any IEC requirements that prevent the connection of 400V (60 Hz) NEMA motor (e.g. HVAC equipment) to a network 400/230V 60HZ designed based on IEC.

Universal receptacle http://files.engineering.com/getfile.aspx?folder=587c7f12-32b0-475b-9b02-c25cf7fe7bf3&file=Capture2.jpg

Is the use of universal receptacle acceptable to the NEC, what about European type.

jraef: The frequency is 60Hz, any specific requirement for the motors (400V – 60HZ). Could you please elaborate on the Receptacles issue why they are totally different. Can I specify European receptacles e.g. British type (13 amp) or German type (16 amp) and still comply with NEC, what about...

That is what they said equally performed NOT UL listed for these voltages, what about the rest of the installation any problem with other European devices e.g. receptacle, switches, motors, lamps etc. with respect to the NEC requirements.

I understand your argument related to SCCR from the technical point of view, but when I asked the manufacturer they replied that the MCCB will equally performed on the European voltages but they are not ul listed for these voltages.

Thanks Rafiq, Just to clarify my point, if we take the MCCB as an example, the American manufacturers can provide either MCCB with breaking capacity to UL 489 listed for American voltage only 480,277V...or breaking capacity for European voltages 400, 230V... tested to IEC 60947-2. i.e. there is...

We have a project where the client wants to follow the American Codes/Standards but with European voltage ratings i.e. 400/230V. I know that most manufacturers now (e.g. Eton, GE..) produce products e.g. Circuit Breakers that are tested according to both European (IEC) and American Standards...

powerwagon75, I agree, it is expensive and has a microprocessor-based control system, but the alternative solution is more expensive (ATS + breakers.).

ASCO Series 300SE ATS service entrance is a typical ATS with additional breaker for the utility power supply as dpc said, while Cutler-Hammer service entrance ATS uses two circuit breaker, instead of switches, to transfer the power, so there is no need for the extra ASCO Series 300SE breaker. I...

waross, We are still in the design stage, but the load is critical and I don’t think that two mechanical interlocked breakers, made by an assembler, will comply with the requirements of UL 1008 and IEC 60947-6-1, unless it has been tested to UL 1008 and IEC 60947-6-1as a complete assembly and...

The additional breaker will be 3000A (air circuit breaker) which is expensive especially I’ll have another one in series after the ATS for the main distribution board. Actually I was trying to avoid the use of Cutler-Hammer service entrance ATS (i.e. ATS with two circuit breaker), I believe it...

Waross Thanks for your reply, Actually it is NEC code issue, this is a new installation, the transformer and generator rating is 2000kVA the main breaker size is 3000 Amp 380/220 V. The question is it acceptable to have the ATS installed dirctlly after the transformer before the main breaker...

Hi everyone, I would appreciate your comment on the following case, We have an essential load connected to one transformer 2000kVA where the whole load is backed up by a generator through Automatic Transfer switch (ATS). Q1: Could we have the ATS installed between the transformer and the...

I'm referring to my old thread184-20314 related to the above mentioned subject. Actually the use of Variable speed fire pump controllers has been approved by NFPA 20 – 2003. you may refer to the following clause. 10.5.5 Variable Speed Pressure Limiting Control. Variable speed fire pump...

The below table was extract from NEMA Standards Publication 250-2003, “Enclosures for Electrical Equipment (1000 Volts Maximum)” Table A-1 [From NEMA 250-2003] Enclosure Type Number IEC Enclosure Classification Designation 1 IP10 2 IP11 3 IP54 3R IP14...

First, HID lamps require time to warm up. It varies from lamp to lamp, but the average warm-up time is 2 to 6 minutes. Second, HID lamps have a "restrike" time, meaning a momentary interruption of current or a voltage drop too low to maintain the arc will extinguish the lamp. At that point, the...

Hi, I’m preparing the commissioning document and testing procedure for a project where there are number of elevators installed with 4 m/s (800 ft/min) speed. My question is related to the acceptance inspections and tests as tabulated in ASME Aa7.1-2000 section 8.10. specifically to the Governor...