Spare Conduit %

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bwat

EE
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EE
Looking to see how this is typically interpreted within the industry.

If you have a spec that you have to have a % spare conduit, how do you calculate that percentage? Spare / Used ? Spare / (Spare + Used)? etc?

Let's say the requirement is 25% spare, and you'll be using 4 parallel conduits in this run. Do you need 1 spare conduit or 2 in order to get to 25%?

(1/4 = 25%)
(1/5 = 20%)
(2/5 = 40%)
 
retirede said:
What is the exact wording in the spec?
Click to expand...
Examples:
The good ones: Contractor shall provide an amount of spare, unused conduits not less than 25% of the utilized conduits in each run.
The bad ones: Contractor shall provide 25% spare conduits for each run


The 'good ones' are clear. Maybe I'm biased, because I wrote that one above. But it's ones like the 'bad ones' example to me leave it up to interpretation, and I didn't know if there was a general understood interpretation for when it's unclear like this.
 
bwat said:
Examples:
The good ones: Contractor shall provide an amount of spare, unused conduits not less than 25% of the utilized conduits in each run.
The bad ones: Contractor shall provide 25% spare conduits for each run


The 'good ones' are clear. Maybe I'm biased, because I wrote that one above. But it's ones like the 'bad ones' example to me leave it up to interpretation, and I didn't know if there was a general understood interpretation for when it's unclear like this.
Click to expand...

OK….I thought you were reading a given spec and trying to interpret it.

If it were me, the second example would result in an RFI.
 
retirede said:
OK….I thought you were reading a given spec and trying to interpret it.

If it were me, the second example would result in an RFI.
Click to expand...
Fair enough. Thank you. Knowing that there isn't a widely accepted assumed interpretation is helpful.
 
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