M
matthewbutt
Hi All,
I hope this finds you well.
We are currently specifying a series of flexible cabling for a data centre but I seem to be finding conflicting information re the cable ratings of the H07RN-F cable and I was wondering if you could assist?
In short, we have three independent load requirements, the first is for a number of APC Symmetra PX 40kVA UPS's - each connected to a 100A Merlin Gerin MCCB down-rated to 90A. We would like to specify a 5-core cable for this. The cable runs are no longer than 35M and are on cable basket in free-air laying next to each other.
The second is for a number of 220KvA Generators - each connected to a 400A Merlin Gerin MCCB down-rated to 312A. We would like to specify multiple single core cables for this. The cable runs are no longer than 30M and are on cable basket in free-air laying next/on-top of each other.
The last is for internal wiring within an ATS/AMF panel whereby the maximum load is 400A. Again we would like to specify multiple single core cables for this. The cable runs are no longer than 15M and are inside switchgear panels or metal trunking.
My calculations indicate that a 16mm cable will be suitable for the first load requirement with a 7.56V drop, 95mm for the second load requirement with a 4.02v drop and 150mm for the third load requirement with a 1.16V drop.
I realise the rating is dependant on cable length, method of containment, location of containment/cabling, voltage drop etc but do you have information relating to the cable specification/ratings? Do the calculations above look sound from your perspective?
Thank you in advance for your time.
All the best,
Matthew
I hope this finds you well.
We are currently specifying a series of flexible cabling for a data centre but I seem to be finding conflicting information re the cable ratings of the H07RN-F cable and I was wondering if you could assist?
In short, we have three independent load requirements, the first is for a number of APC Symmetra PX 40kVA UPS's - each connected to a 100A Merlin Gerin MCCB down-rated to 90A. We would like to specify a 5-core cable for this. The cable runs are no longer than 35M and are on cable basket in free-air laying next to each other.
The second is for a number of 220KvA Generators - each connected to a 400A Merlin Gerin MCCB down-rated to 312A. We would like to specify multiple single core cables for this. The cable runs are no longer than 30M and are on cable basket in free-air laying next/on-top of each other.
The last is for internal wiring within an ATS/AMF panel whereby the maximum load is 400A. Again we would like to specify multiple single core cables for this. The cable runs are no longer than 15M and are inside switchgear panels or metal trunking.
My calculations indicate that a 16mm cable will be suitable for the first load requirement with a 7.56V drop, 95mm for the second load requirement with a 4.02v drop and 150mm for the third load requirement with a 1.16V drop.
I realise the rating is dependant on cable length, method of containment, location of containment/cabling, voltage drop etc but do you have information relating to the cable specification/ratings? Do the calculations above look sound from your perspective?
Thank you in advance for your time.
All the best,
Matthew