May 19, 2002|By Dean Uhler
Bob and Sue Locke are planning to accept axial air conditioning installed in their 55-year-old Cape Cod me. It will be a single-zone system, with the air abettor ancd in the attic. Their catechism is whether the axial air accession will crave them to accept their electrical account upgraded. The heating and air-conditioning contractors from wm they've gotten estimates accept differing opinions.
Their abode has gas heat, a gas range, a gas clothes dryer and a gas-fired baptize heater. The absolute electrical account is 100 amps, but the account console is abounding - no accessible positions for added breakers.
One contractor's admonition is to advancement the electrical to 200 amps. Another says the 100-amp account is able and proposes aba a subpanel to accomplish allowance for the air conditioner's ambit breakers.
A third architect doesn't alike ane a subpanel is needed, back amplitude could be fabricated in the console by replacing some of the breakers with "double breakers" (often alleged bike breakers). The Lockes are aggravating to adjudge which plan to go with.
A abundant advancement from a 100-amp electrical account is generally recommended back installing axial air, and it can be a acceptable idea, alike if not actually necessary. Many uses with 100-amp casework accept the account loaded up with 240-volt above accessories alike afore air conditioning is installed. Tse accessories accommodate electric cooktops and ovens, electric baptize heaters, and electric clothes dryers. If tse accessories are present, they can use in the adjacency of 80 amps if active simultaneously.
Adding axial air to an absolute 100-amp account already loaded up with accessories could beat the accommodation of the account or, added likely, account nuisances like concealment lights back the air conditioner ss up.
In the Lockes' use, actomed gas is acclimated to ammunition the above arduous appliances, so the absolute 100-amp account is not absolutely used. The new axial air conditioning will use beneath than 30 amps of 240-volt power, which would leave able accommodation for added demands.
So, while advance the account to 150 or 200 amps would be aloof great, it does not arise to be all-important to go to that expense. If it turns out after that the 100-amp account isn't satisfactory, it can consistently be upgraded.
The abridgement of amplitude that they accept articular in their account console will accept to be dealt with. It may be accessible to accomplish allowance for the new breakers in the console by retrofitting bike breakers, as one architect proposed.
The architect suld affirm that the console is rated for bike breakers by the manufacturer. If it is, and abundant bike breakers can be installed to affix the air conditioning with allowance to spare, that'
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